The hammer rotates on a shaft that is supported inside in the bottom tang, which has built in supports. Then just under the hammer is a support bearing (its a little smaller in diameter then the hammer so it is hidden) which also attaches to the inside support. The tumbler is on the centerline and the trigger simply interfaces with the tumbler.
Design is way simpler then a standard 74 sharps. Parts count is down and much less machining to accomplish.
The flat sides were what I thought would be an obvious modernization. I was trying to think what I would purpose if I lived then when sharps was trying to improve their market. The 1875, 1877 and finally the 1878 were all attempts to do that. There are other examples some shown in the Sellers book. Unfortunately Sharps went full in on the 1878 action which suffered from many issues and worst the management failed to understand their market's desires. An issue that has killed many companies over the years. Ignore your customer's wants or tell him what he wants will soon cause the customer to go else where.
Thanks for the complements.
