Rear Sight Pinion Question

[ChipS]

Greetings. I generally hang around the M1 Carbine Forum but have a long troubling question for Garand guys. I want to put the original type rear sight on my (only) 784,xxx SA Garand and have seen conflicting (or confusing) reports on whether a long pinion is proper in this serial number range. Poyer & Riesch 3rd ed. says either the short or long pinion would be possible. I have a couple of good early T2 (8x36 w/ checkered elev. knob) long pinion lock bar sights but I will get a short pinion & repro T1 (6x40) lock bar if indicated. P&R says I am too late for a flush nut. I would appreciate educated opinions as to which sight (or sights) would be most probable as the original issue type for my rifle. TIA

Information

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[RCS]

Scott Duff's book "The M1 Garand WW2" has a data sheet on Springfield s/n 883325 (Oct 1942) with a short rear sight pinion, checkered elevation cap and knurled windage knob. Also he has a data sheet on Springfield s/n1006586 (Nov 1942) also with a short pinion and both the elevation and windage knobs being knurled. Duff also has a data sheet on SA s/n 793818 that has a short pinion, checkered elevation cap and knurled windage knob. These rifles all used the Type 1 lock bar too.

Winchester used the "flush nut" to Jan 1943 on production rifles but they were changed to the long pinion and lock bar.

[Joe W]

Guts, there are two articles on the markings, one by Tony Giacobbe in the Spring 1993 GCA Journal and another by Tony Pucci in the Fall 1993 edition. This is a photo of the mark on my Mar. 42 .