Welcome to the forum - I changed the title, but see you wrote 1837 in the description also
What are you needing to know?
Does the magazine match the gun? It appears to be an eagle L (police), but I can't tell from the pictures.
The acceptance and proofs on the right 'appear' to be eagle 63's, but again, close up pictures and pictures of the rest of the gun, to include suffix on the front frame would help us, help you.