I know this is not a shotgun question, but i know a lot of you guys are extremely knowledgable on all sorts of firearms. If i upset anybody with this question i am sorry. I have a colt huntsman 22lr pistol, my 30th edition blue book sais this gun does not have a hold open, but as you can see in the picture it does. The serial number is 071399 S. Can anybody give me any info and or date of manufacture. Thanks for any help you can give me.