Hello, I recently picked up this Hipolito lantern on eBay, $60.00, missing it's glass globe. So, for another $100.00 I picked up a new globe, mantles, spare parts kit and a reflector. After draining the tank of old fuel and rinsing it out with a little fresh kerosene, and replacing the washers and valve cores it looks good to go. Passed the dunk test, good stream of fuel from the vaporizer. Looking forward lighting it up.
I do believe the number on the base is a date code, if I am correct it would be the 22nd week of 1990. If I am wrong there will be other members to correct me .
I am afraid it is a little more arcane than that : tax your mind here: Dating a lantern (give it a place on a time line) You have scored a nice example of a great lantern