I have a question that even Roy Jinks can't answer. Standard Catalog of Smith and Wesson states that "at least one 681 is known to exist that is mismarked 68-1". I have three. Two were manufactured in 1984 about 500 serial numbers apart and one was manufactured a full year later in 1985. I paid Roy for the certs, but he has no records to indicate how many mismarked were ever produced. I think that these "rare" guns may not be as rare as the Standard Catalog indicates??