I've got the OPL if HTC has the ride............
France had two reticle. The one shown and then a later reticle set of 7 that were swapped out by hand to account for 7 set speeds of the con. Basically this reticle but with small circles at the end of the radial lines which for each speed a straight line radiated out to a small circle at the projected hold off. Very few pilots used that and preferred the one I've posted.
French OPL Gunsight
The "Optique de précision de Levallois modèle 1939" called "OPL "RX 39", "RX.391" or "RX.393". It was mostly used in the Dewoitine D 520 and the Arsenal VG33 but was also seen on the Hawk H-75 and the MB 152.
OPL RX 39 in D.520
