Tom as I said, that erector set is in a box. It is not in an Erector set box therefore there is no number. I will get pictures of it. I didn't have time tonight. Also have to find that slot car track set. No pressure.Woah! We need pictures of the Erector set, What number is it? I had a 1955 7 1/2 Engineers set but it is long gone.
Bad memory and too much stuff are a bad combination. At least in my case.