Hi, I’m lucky enough to have most of the Molineaux and Webb and Percival Vickers insulators on Neil’s illustrations, I have numbers 1 and 2 on the PV list my 1 is green and no. 2 is clear. Your green one looks like my number 2 on the PV list. I’ve also included my Molineaux and Webb ones which are similar but not so bulky more shallow.
Cheers Mike