If you come across the symbol 'Pm' (Promethium 147) on a watch dial, this also is reference to another type of lume, used for a short while in the 60-70's.
I did post a thread on this subject couple of months ago.
Hope it helps.
Great find & timeless vastly underrated IMO.
I haven't come across cal 6112 either, is it anything like this ?
Here's a couple of pic's of my 1970 Record de Luxe, Cal:651, Longines 701 (courtesy of @WRENCH fund raiser)