Originally Posted by Hondo44

Very nice job for a difficult task. A few comments just off the top of my head:

At the end of British 455 production there was an additional 691 TLs shipped commercially.

A very few of the earliest TLs were 4 screw models (no trigger guard screw).

The lack of finding .450/.455 Eley chambering is no doubt because they were shipped to England commercially and few came back to the US.

There are a very few Bisley Target models (rear adjustable sight for windage only per Bisley match rules) shipped to England.

There were more than one TL chambered in the 45 S&W Special (45 Frankfort) for the 1906 Army Trials. At least one was destroyed in testing.

And not every serial number in the TL number range was likely shipped owing to possible frames that didn’t pass final inspection, etc.

Hope this helps.