Dusky,

Generally on the Nissan/Nikki vaporizers the Nikki number and the Nissan number is stamped on a raised portion of the front plate in the upper left hand side. It will be hard to identify from just a picture as they pretty much look the same. Do you know what the vaporizer came off of? If you want to send me a picture you can email it to me at s_schilstra at yahoo dot com replace the at with @ and the dot with a period.