Hey all. Looking for some knowledge.

I bought a few locks over the years for my thompson flintlocks and I have one that I can’t identify. I have a couple thompson Pennsylvania hunters and a firestorm. I bought a new lock on eBay a while back and finally tried to put it into a PA Hunter stock only to find that it doesn’t fit. Doesn’t fit by much, but doesn’t fit. I was wondering what this lock will fit, and if thompson made different locks for firestorms, pa hunters, renegades, Hawkins, etc.?
In the picture, the PA Hunter lock is on top and the mystery lock is on the bottom.
I see the differences but don’t know the differences.
Thanks in advance for your input. Thompson Locks

Darn! I am not Familiar with the Flintlocks? But i am the percussions, the Renegade, The Hawken, and the New Englander are all the EXACT Same Locks (i have MANY of them) The only TC locks that i know for POSITIVE are different, Are the TC Cherokee and Seneca, Those 2 are basically a very Scaled Down version of the Hawken and Renegade. But I am pretty sure all of the other Sidelocks Share the same Locks? Percussion that is. I can’t imagine them changing the Flint Lock Around, But Maybe they did? I will keep an eye on this, i am interested to know.

From the pic, they look interchangeable to me

Is the bottom lock a Lyman? Just thinking. I know nothing about Lyman locks

Bottom lock - looks to me like one of the Cabela’s branded flintlocks.

Investarms? They are are coil spring driven as well.