Mystery part

[Alan de Enfield]

Mind you, it's possible it has nothing to do with a P-14. Buying boxes of stuff can be like that.

You can say that again. I bought a big box full of small boxes (typical LE parts boxes, springs, screws etc) but one box confused me as to what they were, I asked here and was informed that they were :
























Small 'buttons' that push into the sides of display cabinets, a glass shelf sits on top of them (one in each corner)