Can't fool you!Joe
The first thing I noticed is, according to your ruler, that thing is over 300 inches long!
Ed, you still haven't found the BIG one!
Joe
Here is an early original with a BIG clue
View attachment 215831
That is one of the errors. Production started in 1886 and 37 is the earliest serial number known so 125 in 1885 seems unlikely. But, there is still a much bigger problem to be identified.1885 vs 1886.
That is important. What does the screw size indicate?The size and type of the screw near the front top strap?