Re: Winchester model 62 help
Your right, your Winchester model 62 with serial number 88XXX was made around 1939 and probably has the short, about 6 inches long, fore end with 10 grooves. They are pretty neat 22's.
Yes, unfortunately, it has two extra holes in the left side of the receiver. Usually a scope mount required 4 holes but I suspect there may have been scope bases that needed only two holes. Or else some type of receiver mounted peep sight.
Regardless, it hurts the value of your 62. My estimate for an all original model 62 of 1939 vintage in excellent condition with some minor blue and wood finish wear would be in the $800 to $1000 neighborhood. My guess for your gun with the extra holes would be maybe around half the value of an original gun.
I have a 4 digit serial number model 61 with 2 extra holes on top of the receiver and 1 in the barrel that I paid much less than half what it might have been without the holes.
Hope we can get some more input from others.