There may be only 3 MAJOR variations but there are a few more minor but yet significant ones as well. Ones I've observed:
1 - super-long slide (175?) with folding peep and screw-in disc
2 - long slide (125?) with folding peep and screw-in disc
3 - long slide with screw-in disc but no folding peep
4 - long slide with target knobs and 1/3-minute clicks
all above are prewar 'full-block' with captive elevation screws
5 - long slide(60), 1/4-min clicks, full-block non-captive screw, prewar style knobs
6 - short slide(60 with flat bottom), 1/2-block, target knobs
7 - short slide as above with hunter/stayset knobs
In addition to the above I believe that Michael owns at least 2 versions of the #1 super-long slide model and I also seem to remember having owned more than one version of #s 2 & 3 above myself, with very minor differences. These remarks apply only to the 48S and 48C, 48 sights for other models may differ.
Regards, Joe
