Old gun values/ manufacture dates?

[bradshaw34]

A friend of mine wants to know the values/ manufacture dates on some older handguns.
Gun #1 Colt Police Positive .32 according to colts website serial number lookup was made in 1926. This gun is in great condition with some minor blemishes and very very minor surface rust. I'd say around 90%
Gun #2 Remington Derringer doesn't even say what caliber. It has 287 stamped on the under side of the lower barrel. It looks good on the outside but the barrel is pitted and the rifling is hard to see.
That's all I know and could find on these guns if you know manufacture date/ values, or where i could find them, I'd greatly appreciate any input! Thanks!

 

[bradshaw34]

Oh by the way the remington appears to have a bore larger than 38 special. I put a .38 special cartridge in it to check fit. And it fit pretty loosely. What cartridge could it be?

 

[348Winchester]

The Colt is about $300-400 maybe more for a six inch barrel.

The Remington is most likely a 41 rimfire. I could not tell you its value.