I decided to take the locks off and take a look on them for numbers. Very clearly engraved on the front of each lock, and on the insides of the hammers is "1217". And in small letters upside down on the lower rear of the lock plates is "J. Stanton". The barrels equally clearly say "1277". As 1 and 7 can look very similar, I studied them closely, and am convinced that there is no mistaking either.
The outside engraving matches the pattern I've seen on other H. Holland back locks, and to my fairly unexperianced eyes seems legit.
Treblig, do you have a date on number 1849 or any further details?
