Mazda 40w GLS lamps with B15 base

These lamps saw limited popularity in the 1960's and 1970's, usually used in public places to combat lamp-theft! Prior to finding these, and some Ekco 60w versions I will upload in a moment, I only had a couple of loose examples. I found these on a fairground suppliers' site of all places! They still have a few in stock, so for those looking to add them into their collections, here is the link: https://www.rundles.co.uk/product/40w-240v-pearl-gls-b15-light-bulb/