It is later than that I think as it uses a coil main spring. Probably from the early to mid 50s.
Just how far is it taken down. Not to bad if trigger not disassembled.
Smallest coil spring about 3/16 od goes in hole in front of frame cut out above front of trigger guard. Then the bolt that locks up cylinder goes on its stud. You must compress spring to get it in unless the frame has a screw in front of trigger guard that is removed to install spring from front. Once bolt is in place the trigger assy goes on its stud, the hand must be held back a bit to clear frame then pop forward inbto its window as trigger is moved into place. Its front tip goes in the notch in bolt Then the rebound slide gets its spring (about a 1/4" od and an inch long) spring goes inside slide then the small round socket in front of slide mates with the ball on the end of the trigger lever. Slide must be laid at an angle, then it and spring pressed forward with a screw driver until the end of the spring just clears the post for it and the slot in slide goes down over post. I hold my tongue pressed over to the left side of my mouth and it seems to help. Now with trigger held back a bit and the latch assy all the way to the rear the hammer can go on its stud. Everything has to be in a position so firing pin clears frame and the hammer sear slips in its position with trigger sear. Then, there is a strut with a ball on one end and a long spring, and a small collar with a hole that makes up main spring assy. The collar goes on last with square side of od against the spring. Compress spring and stick a small pin, punch or finish nail below rounded part of collar, thru hole in strut. This holds the spring compressed so you can stick the ball end of strut in socket in hammer. The ball of collar then goes in its place in grip frame and when you cock the hammer you can remove pin.
If the trigger assy is in pieces that is another paragraph or so to put back together. But, there is a tiny spring fro the double action sear, (a small toggle like piece similar to the one on your hammer, then a little fine spring with a couple arms off it that go inside the trigger slot. one end little arm goes against trigger itself and the other must be loaded while one pin of the hand goes in a pivot hole and the other pin on hand goes in a slot so that the other arm on hand spring presses it forward. The toggle that is operated by rebound slide is pinned in trigger.
Now the hammer block, a small bar with a flag on top and a rounded piece on bottom with a slotted hole, the slotted hole goes over pin sticking out side of rebound slide and flag goes in front of hammer. Slide the hammer block all the way up on pin in slot. Lay top of matching channel in side plate for this block on block arm and slide side plate up so tit on top goes under top pd frame and press down eon side plate. Should go home. Sometimes you have to mess with hammer block and side plate to get this right. I hope I remembered everything right.
Good luck.