The serial numbers, combined with pics of specific horns and their respective numbers (especially in the 'Modern Vintage Holton' thread give a pretty good idea when theses horns were made. I haven't seen a list as you have laid out, but member LaPorte posted an accurate serial number list. I think the Resotones were also made at the same time as 203/213/215s (Revelations when they gained model numbers). For example, 232 (right side bell keys) and 233 (left side bell keys) were apparently were made at the same time. Note: there seems to be a lot of overlap in some models. These are very ornate and have a ring around the bell edge. Jazzbug has a 214 Tenor, and there's pics of a couple 204 altos. Other weird and rare models: Reso-tones-search the Holton section-some good info and pics in there. Here's a 666-pretty rare-even with the fancy silver and copper metal, still marked 'Collegiate' Their engraving was sometimes a large globe. A lot of the numbered models were just identified by their number, as far as I know, aside from the kinda rare 400-series horns (the alto is a 465, the Bari is a 480) which did have a name, the 'Ideal'. There were older Collegiates too, very similar to the 'Revelations' (Revelations are usually called 'Elkhorns' by non Holton folks, as that's all that's really engraved on them, other than a design.) Those Collegiates will also be clearly marked by engraving on the bell. The 566/666 (altos) and 576 (tenors) were indeed Collegiates-they will have a large 'Collegiate' engraving on the bell. We then correlate those with old ads in many cases (i.e., the 234/Stratodyne). Aside from the early models (Beauforts and early Revelations) without a model number, the number will be stamped right above the serial number.

Holton trumpet serial number list