Breach load Springfield identification?

[Jmadl]

Hello, new to Modern Muzzleloader forum, not new to Muzzleloader forum.
I do mostly flintlock and some Percussion.
Sorry if I am posting to wrong thread as I am not familiar with this site.
I was sent over here from over there as this piece is a breech loader:

This not mine but a friend's.
He just had a bunch of firearms handed down through the family but no information on any of them.

This Springfield caught his eye and is trying to find out if it is original or a reproduction?

I am out of state right now (father having heart surgery Wednesday) so he sent these photos asking what I can find out.
The lock appears to have a stamp "1875" or "1845" that makes us wonder; were they stamped with the year back then? (Called today, he 'thinks' it says 1845).

He can get more pics if needed but he only uses a phone.

 

[deermanok]

Can't help with the gun but can welcome you from southeast Oklahoma.
Best wishes for your dad.

 

[WP79Vet]

Welcome from Montana, and best wishes to your dad.

The Trapdoor Springfield was adopted by the Army in 1873, so it's unlikely that the date is 1845. Beyond that, I don't know how to tell if its an original or a reproduction.

 

[gle3105]

Jmadl, It appears you have an early Allin conversion. Which took left over muzzleloaders from the war and converted them to breech loaders. The lock plate, stock and rear sight is a visual indicator from the pics as to my conclusion. Lock plate maybe 1865?
Caliber may vary.
Erskine Allin was the master armorer at the time back then.

 

[Jmadl]

Jmadl, It appears you have an early Allin conversion. Which took left over muzzleloaders from the war and converted them to breech loaders. The lock plate, stock and rear sight is a visual indicator from the pics as to my conclusion. Lock plate maybe 1865?
Caliber may vary.
Erskine Allin was the master armorer at the time back then.

Thanks for the info there gle3105!
And thanks to the rest of you for the well wishing....my father is in recovery now, doc says all went well, whole family now just sleeping in the waiting room.

I asked my friend to get me a better shot of the lock so I could read the date as well as a photo down the barrel and its caliber.
I doubt I will be able to get either until I get back home (next week) as all he knows is how to pour powder and blow smoke.

I will however let him know that, with me actually holding it and inspecting the barrel, it is most likely worth the $500 he offered for it.
He is hoping it is serviceable to shoot...but...until I can hold it...