The main difference in the 69 to the 69A was the grooved receiver. Mine shot okay with irons but I put a scope on it for extended range use. MB
Actually, only the later 69A's have grooved receivers. I have about a half dozen 69A's and a couple 75 Sporters and only a few of them have the grooved receivers. Since the 69A's and the 75's used the same action, it isn't unusual to find 75 Sporter stocks on the 69A's since the 75 Sporter stocks have the checkering on them. I'm not aware of any 69A or 75's that came with a grip cap...
If you really want to learn about the 69, 69A's, and 75's check out rimfirecentral.com on the Winchester forum. Tons of information on these rifles and the 69A's were available in a lot of various configurations...
If the price was right though, like in the $300-$400 range or less, and in great condition it might be worth picking up anyway. They are terrific shooters and very accurate and one of the best made squirrel rifles ever IMO....
Bob