I looked for numbers all over the gun and the only numbers I found were in the third lock and in the ejector rod (183).
I took some more pictures to help identify the gun, but I think it is a triple lock with remarked serial numbers. The reason is the shape of the gun (4 screws, hammer, trigger and grip design and obviously the third lock). Do somebody know other gun with the triple lock design or this is the only one?
Third lock and the ejector rod numbers
The .44 bullets on the cylinder - they don't fit perfectly but I think its because of the rust
the two .44 bullets and a .38SPL for comparison
Thanks for all the help