I know that there are problems with some of the SN ranges in TBOCF. Are you saying that the information on p. 357, which states that the OMS SNs started in the year 1949 with starting range of 783001 is incorrect? The OP's 7803** is below that, and higher than any shown in the 1949 range for the Official Police p. 346, and the OP ranges go crazy after that. The 1951 range begins at 830550, the 1952 range, 818200; 1953, 825300; and in 1954 is back to 830550--exactly where it started in 1951! And that's the table from which the 1950 date comes. The same info is in The Colt Heritage and that little $20 Blue Book Guide edited by John B. Allen in 2008, with Wilson's name on the cover.
So, I've given up on those OP ranges and hence my question about the data on p. 357. Is there any solid information on the SNs and dates during the changeover from OMT to OMS? (Aside from a letter?)
(BTW, I don't think apologies are necessary--I'm sure I'm not the only one a little leery of those who are easily offended.)