I think, that You won't be against if I'll show You my collection of lanterns in this topic
I decided to start showing from one russian model, that loks very similar to polish Mesko ORZ 6 and 7, and compare it with Mesko ORZ-7. It is russian RKU (for mercury lamp) or ZKU (for sodium lamps) 00. I think, that this model is a russian copy of polish Mesko ORZ-6 or 7 because it was produced 1982 - ~1992.
ballast:
I made few fotos to compare it with my Mesko ORZ-7-1-1
passports:
The shape of theese lanterns is so similar, that you can change their closures