Vehicle registration plates of Estonia

Vehicle registration plates of Estonia are divided into 18 categories, the most common of these (A1) is composed of three numbers and three letters (e.g. 123 ABC). Most registration plate types have black letters on a white background, and the plates are the same size and length as other European plates (520 × 113 mm). Previously the first of the three letters indicated the region of Estonia in which the car was registered; however, as of 2013, this is no longer the case. The third digit from the numbers indicated states when the car is due an inspection. It can be inspected up to 2 months after that digit. The registration plates are printed on an aluminium sheet with minimum thickness of 1 mm and must fulfil the requirements of ISO 7591:1982. All plates are issued with the blue European Union identification label, except types A9 and B2.
Types of plates.
These are the different types of plates in use in Estonia:
Diplomatic codes.
These are the two-digit codes used on Estonian diplomatic plates, beginning in 1992.
History.
On July 1, 1907, the City Board of Tallinn issued a decree concerning the moving, registering and taxation of motor vehicles. The cars only had a rear license plate, whose color varied every year. Other city council in the gouvernements of Estonia and Livonia issued similar decrees, some of which were still valid until the mid-1920s. The size and color of the plate was decided independently by every council. Chiefly they only carried the order of registration, sometimes the name of where the plate had been registered or a shortened form of it.
On August 27, 1920, the City Council of Tallinn favored the decree "On the compulsory registration of automobiles and motorcycles within the limits of the city of Tallinn," an evolution of the Tsarist decree. Cars still only had a rear license plate, and the color still varied every year. The plates were made of tin carrying numbers starting with 1.
On December 7, 1922, the decree was changed. Motorists were ordered "upon fastening a tin order number to the rear of their vehicle, to add a white iron plate in a visible spot in front of the car (under the radiator) on which the order number given by the city council has been printed." Since car owners were able to do a test drive before the technical inspection, a "test" number valid for three days was issued. It had to differ from the current number by shape and size. The plates of the previous tax year had to be changed to the current ones until May 15.
From 1923, Tallinn license plates became four-digit. Plates starting with 1 (from 1001) belonged to members of the Union of Estonian car owners as per a contract signed with the city council of Tallinn, and plates starting with 2 (from 2001) were issued for other cars. This decree lasted until the end of the 1925/26 tax season.
From then on all cars registered in Tallinn had unitary license plates starting with 2. Motorcycles were registered differently, the numbers were three-digit starting with 101.
In 1925, when the Tallinn and Harjumaa plates were manufactured in Aleksander Karja's engraving shop, the font changed. The color of the plates still varied per tax year. For the 1928/29 season they were green with black font.
For the following 1929/30 tax season the financing sector of the city council planned for plates with white font on black background, but the new regulation for registering motor vehicles declared unitary license plates on May 14, 1929, which were required to be changed until July 1. Because this regulation appeared after the beginning of the new tax year, the new black plates were already prepared and had to be melted down. 
The new regulation had something important missing: test numbers were now exclusive to car dealers and working places. If a civilian repaired a car or motorcycle in his own home, he lacked the legal chance to bring his vehicle to the technical overview, as test numbers could not be given out to private persons and driving without a number was prohibited as well. As a solution, the city council of Tallinn issued the 1929 tax year plates as test numbers for private car and motorcycle owners. These were now red with black font starting from 3001 for cars and 301 for motorcycles, written above the numbers on the rear plate was PROOV (test). This started a discussion in the city council with the Road Ministry when its representatives saw cars and motorcycles with red license plates on the street. Nevertheless, in August 1929, the decree was accepted by the Road Ministry and allowed vehicle owners to drive to the technical overview without a number, but with a 3-day test plate on the basis of a written declaration. This decree remained unchanged until the end of the first republic.
After the USSR's pact of mutual assistance in the fall of 1939, several Red Army trucks without license plates arrived in Estonia. As it was forbidden to drive without license plates in Estonia, they were given Estonian license plates. One such truck with the plate A-2798 is known to have been involved in an accident with a 14 year old cyclist on April 17, 1940.
On April 19, 1941, the Estonian SSR Informer ("Eesti NSV Teataja") published the People's Commission of the Estonian SSR's decree for registering vehicles. Following this, the People's Commission of the Interior's militia government was missioned to replace all old license plates and technical passes with the new ones until June 1, 1941. The basis for the plates was the People's Commission of the Interior of the USSR decree on registering motor vehicles from July 22, 1939. The new plates were black with white ciphers in the format ER-12-34 and ES-12-34, but differed in size and shape completely from other Soviet license plates. Manufactured in Estonia, the front and rear plates were 112x340 mm and with the 1939 rift (Soviet rear license plates were square at the time) ER motorcycle plates were 85x255 mm, with the number printed on both sides on the front plate.
On November 18, 1941, the German occupying powers issued a decree for registering and reregistering vehicles. The plates were white with "Est" in black letters and a five digit number. On top of this, a so-called consent of registration, the "Zulassungsausweis" (at first called "Zulassungsbescheinigung") had to be attached inside the windscreen.
For reasons unknown, General Commissioner in Estonia Litzmann did not like the decree issued by the Estonian Home-Rule Government and stopped the issue of the "Est" plates in early January 1942. Until the end of the year, all plates issued with occupational technical passes and registration consents were valid:
1. Republic of Estonia license plates (most of them 1940, a few 1939)
2. 1941 ESSR ER and ES plates
3. Estonian Home-Rule Est plates.
From January 1, 1943, the German highway code was valid in Estonia and all local vehicles were issued German plates starting with RO (Reichskommissariat Ostland) Estonian numbers were limited to RO-10000 - 29999.
These plates were issued until the Red Army occupied Estonia in the fall of 1944.
The first, post-Soviet, Estonian registration plates (1991) were composed of three numbers, with a licence label in the middle of the plate. The labels were dropped in 2004.
Only two suffixes were used on Soviet era plates: ЕА and ЭС. Neither identified any specific town or city, but rather served to inform that the vehicle had been registered in the Estonian SSR. There were plans to introduce an additional ЕС suffix, but as this occurred just before the collapse of the Soviet Union, the mark was subsequently allocated to the Russian city of St. Petersburg.