Early M1 trigger housing

I got this trigger housing recently from a woman who was cleaning out boxes in here deceased fathers house. The drawing numbers are good for the housing and trigger guard but the hammer and safety are slightly later. Does this make sense for originality? Thanks! Ahead of time. On Scott Duff's data sheets the last time a 2 SA Trig Housing and 1 SA trig guard are together is 5/41. The 1st time a 3 SA hammer and 9 SA safety are together is 8/42.

Your parts are not original to the revision 2 trigger housing. The revision 2 trigger housing used the revision 2 hammer and revision 6 (without hole) safety. The revision 2 trigger housing came out in late 1940

All of that wouldn't matter to someone that needs the housing. None of it's junk...just not originally assembled.