Hello Peter,
I have seen differences in ``regular ``toggle rear pins. Some have a machines circular ridge below the pin head & some dont ( more scarce ). The PIC shows a 1920 pin without the machined circle on top with an S/42 pin below that has the machined circular ridge below the head. Both have the same `` regular `` head size compared to a 1916 DWM Navy that has a head diameter of 0.355. I dont know if this helps but it is just to illustrate differences in toggle rear pins...
Marc
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