However, I've been searching for one of these reflectors & have been told that they may have originally been fitted to certain (not necessarily Porsche) tractors :
& without the rubber 'cover' :

It was made by ULO (early '60's ?) & diameter is 71mm (including rubber cover) or 56mm (without).
Anyone recognise it ?
Please note that I'm looking for an exact match - I already have several sets of 'similar' ones ...



