Like I said - some 'had' dates when done before WWII - many didn't.
Since 'most' of them went through the huge 'Clean and Repair' program in 1947 after the initial upgrade, along with the WWII-issued carbines, Garands and other TO&E weapons that weren't going to be declared obsolete - those got Inspector's marks and location of modification marks applied at that time.
By the time of that program - the military had ceased to make the finger cut-outs and just detail-stripped them, cleaned and finished them and then reassembled them with no regard to whether they were installing a WWI or WWII-made part.
They just reached into the parts bin - slapped them together, and put them in storage.
Many, many of these would eventually be released by the DCM, through the NRA - for under $20.
My advice to you is this - 'if' you're worried about being scammed - WALK AWAY NOW.
I can't handle the piece personally, and without being able to do that important thing, I can't really help - and no one 'really' can.
'You' have to make that decision based on your personal experience with rebuilt .45s - who you're dealing with and his price - and what his reputation might be - and if he's an on-line dealer, you had better get a three-day inspection and the ability to get your money back.
In today's world of collecting, and with the excellent books available, it's damned difficult to locate a 'sleeper' .45 - way too many guys are scouring America for them.
'Personally' - having owned so many - they don't do anything for me and I merely think of them as re-works - but other guys want every iteration, no matter what, so they pursue them.
Good Luck!
Scouts Out!