[BrokenTapConsulting]

So I have a customer who is looking to restore a 1935 Packard "radio control head" and I need some technical information regarding the materials used for the (yellow/amber?) translucent plastic radio dial inside the housing (the Philco part # is 27-5247, with a designation of either P-1421 or P-1422). It looks like some sort of laminate to me. Do any of you know what material they used or have access to technical documents or at least be able to point me in the right direction? Haven't been able to find any for sale so we might need to make one...  (My background is in machining and manufacturing processes not radio components).

Any help is much appreciated!