Interesting that a couple of you think that a "70B" could be an Ace. The box is handwritten so it doesn't help me much. The slide says "Colt Service Model (ACE in the Diamond) .22 long rifle" on the left. Then just "Ace" on the right side. What period in time would the slide have been made.
Are there any other tell tails that I could look at on the gun to help determine what it is? Thanks for all your replies!!!