Thorn 15w lacquered pygmy lamps for use in strings

I recently found a very nearly complete box (annoyingly 1 green lamp is missing!) of these lamps on Ebay recently, which although made by Thorn have been left unbranded and were obviously sold and maybe even lacquered by a different company as spares for some kind of light string (Foster Electrical Supplies, Ltd. apparently). These are very nice when unlit, although some light cracks/patches in the lacquer are visible when lit, and they aren't quite as vibrant-looking.