I agree with you that it would be worthwhile to have production numbers for our beloved Heuer chronographs. For the purists / historians, this is the crucial data (whether we are counting Ferrari GTOs, violins or the rarest bottles of wine).

I am just about convinced that there is no reliable information of this type; not in Heuer's records; not in anyone's memory; nowhere. There may be data on some models (for example, the original Viceroys), but this will be far from complete.

Accordingly, I am resolved to the fact that all that we have is "Samples Per Year" (SPY) . . . meaning, the number of samples that modern-day collectors can expect to find offered for sale, over the course of a year. In the end, maybe that's all that matters.

Jeff