Interesting Pistols

I have two 9mm pistols I know very little about. I do know they are old Browning Hi-Powers , I think made before WWII but I am not sure.
I acquired them many years ago from a man who owed me $300 and gave me these 2 pistols in lieu of money.

They did not have grips on them when I got them, They would have been wood, I installed the grips you see as a measure to be able to shoot them.  The serial #'s are 21XXX and are 3 numbers apart. When I tried to look up the numbers I could not find any that low. (The Serial #'s in the picture are partially covered.)




Here is a close up of the left side markings













This is interesting, they both have 500 meter tangent sights however being only 3 serial numbers apart notice the difference in the way the 2 sights are graduated.  The top one has the 500 mark near the pivot point of the sight while the lower is about half way.











Both are slotted for a shoulder stock. They also have an internal extractor which differs from the newer pistols. They still function and shoot well however I don't shoot them much. The serial numbers on the frame and slide match and apart from the grips appear original. I wish I knew more of the history behind them I am guessing they are more valuable together due to the serial #'s
From what I read they may qualify as a 
curio and relic.