Lake County has average temperatures ranging from the low 30's in the winter to the high 90's to low 100's in the summer. An average humidity of 50% in the winter and 30% in the summer which means virtually none of that famous California fog.
They are lever locks, with between 6 and 12 levers. They are double bitted and asymmetric, so the lock essentially has two different sets of levers. In addition, they are mostly quadruple throw, so you need to pass 4 sets of levers. The bolt work has 2 or 4 hardened steel circular bolts, providing good saw resistance.
Above: A telegraph register unit, made in Utica, NY by the Chubbuck Co. Above: A duplex key or double speed key, a device that has a contact on both sides of the key arm. In April, 2014 we received the following comment: The double speed key was invented and offered as an alternative to the straight key. Telegraphers using a straight key over a long period of time developed Carpal Tunnel syndrome. The double speed key was a SIDESWIPER and often referred to as a cootie key.