Cocking indicators? - Yes, AKA 'Hammers'
Gas vents? - No. The holes are in the traverse pin—the “axle” that passes horizontally through the fences and the lifter lever - and upon which the lifter pivots. The holes are
for a drift to drive out the traverse pin with out marring the pin.
Load indicators - Powell's patent No.1055 of 1869 was for a firing pin retraction system. In most cases, the firing pins had white metal inlayed into the top surface that
noted "loaded," if a cartridge was in the chamber.
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