This ~would~ be the EIN [310] with the patent dates on rear dome reading CAUVET/ JULY 25 1865/ PAT JAN. " 1870/ " FEB. 22 ".The embossing variant is as follows. It really reads CAUVET/ JULY 25 1865/ PAT. JAN. 1870 (note missing " marks for day of month) / " FEB. 22 ". I have scrutinized this to be sure it wasn't a case of weak embossing and all other embossings are quite readable including the quote marks in the Feb date below that which reads " FEB. 22 " . If you feel this is not an embossing variant that is unlisted when you get it, just send it on back fully refunded, but I know you will agree when you get it.VVNM condition. $18 + shipping.