The O on the lock is stamped over the date of 1862. Therefore the O was stamped after the 1862 was stamped
Lock Manufacturer = Bridesburg
Lock Date = Type 2
Fenian Stamp = Type 4
Fenian Cut = Type 4
“O” Lock = Yes
“O” Stock = Unknown
Breech Block = Type 1
Hammer Shield = Unknown
Wedge Crown = Unknown
Wedge Pin = Type 1
Wedge Joint = Type 3
Wedge Heel = Type 1
Rear Barrel Band = Type 2
Stock = Type 2
Rear Sight = Type 1
Butt Cap = Type 3
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Convex band with screw
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Bridesburg
1862 forward date
O under Bridesburg
The O appears to have been stamped on top of the 1862
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M1858 rear sight
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Type 1 wedge pin
63 on wedge
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IN on left flat
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Type 1 breech block
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