If the battery (label) is OEM, the battery was made in 2014 -- which, correlates with the release date of that system (2014).  Together with the label reflecting a manufacturing date that long ago, it's either not OEM, it's very old,  or it has been "rebuilt" at some point, by someone.  Only your supplier can tell you for sure.  
Dir Sir, I bought a battery for my latitude E5550 from local company which sells the battery with “ original” tag.  Is there any way I can check the authenticity of the battery and manufacturing date?  Note: I attached battery Serial No
Battery and Serial Number