Klein's was still advertising the 36" rifle in the July 1963 issue of Guns Magazine.
Yes. You're correct. I just confirmed for myself that "Guns" Magazine was, indeed, still advertising the 36-inch Italian Carbine as late as July of 1963:
https://drive.google.com/file/d/13ExPXlaXgXv2_0n_nXwVZMnQrUFMgpvH/viewIn the August '63 issue of "Guns", they started advertising the 40-inch version of the rifle:
https://drive.google.com/file/d/1e8gnIUrcK2F1J7bjwAOPMmUmSST5zg8r/viewIt would be interesting to know if customers who ordered Carcano rifles from Klein's while using "Guns" Magazine mail-order coupons from February through July of '63 received a 36-inch gun or, like Lee Oswald, a 40-inch gun. That is something, though, we will likely never be able to ascertain.
If only David Belin had asked Klein's Vice President William Waldman this question when Waldman was testifying in front of the Warren Commission on May 20, 1964 (which was not asked):
Mr. Waldman, can you explain to us why it is that Lee Harvey Oswald (aka A. Hidell) ordered a 36-inch gun from your company (according to the mail-in coupon that he sent to Klein's in March of 1963), but the rifle you ultimately shipped to him one week later was a 40.2-inch gun? Can you tell us why that discrepancy exists in this case?I would have enjoyed hearing Mr. Waldman's answer to the above question. I'm confident it would have been a very reasonable and acceptable answer too. (Conspiracy theorists undoubtedly would disagree.)