check: antiquegunlist.com
If it letters as leaving Colt that way, quite a bit. You are in the 500-1500 range
in a safe,,,,,,,,,,,,,,,,,,,,,,,,,,
Way to little information. What kind of Colt Revolver? Single Action Army? Python? Diamondback? What condition is it in? A set of new ivory grips with a steer head would set you back 800 or so.
$1500 -$1600 without Ivory grips,,, the grips would need evaluation.
You can get faux ivory grips for a Colt Walker at: tombstonegrips.com
Made in 1940. Value will depend on factors you don't describe; overall condition, barrel length, accessories, original papers, original box, whether the ivory is in fact ivory, if it is ivory whether it was factory supplied or aftermarket. Range from a few hundred to a few thousand. BTW, the only way to know if the ivory is factory is to get it lettered by Colt. The Colt website has a section that describes how to do this. Cost will be in the 100-200 USD range.
value depends on overall condition................
100-1000 USD depending on condition and if it letters as factory correct.
Try Nutmegsports.com
To answer the question we'll need to know more about this pistol. Is it a revolver or a semiauto? What model and caliber? I found a Colt frontier scout .22 with that serial number made in 1962.
100 to 500. Maybe more if it left the factory that way.