Nothing so simple!
I've got 4/47 (303 scale) in both 1/2 and 1/4 minute, 4/47 (762 scale) in 1/4 minute scale, and a couple of 4/80 in 1/4 minutes.
Some of the above are in their original boxes; they just have "1/2 minute" or "1/4 minute" written on the label.
I have no idea why AJP and PH competed to see how many different sights they could get under one model number - I must have about ten different types of "PH5C", as well as "PH5CD" and "PH5D" sights that are still identical to other PH5C models...