AP RO

[KimT]

Fandt lidt her om navnet her [url]"http://ap.watchprosite.com/?show=nblog.post&ti=556471" onclick="window.open(this.href);return false;">http://ap.watchprosite.com/?show=nblog.post&ti=556471[/url]

Citat:All subsequent jumbos (and "Jumbo") also used this movement. The term Jumbo has come to refer to the size and movement, not just the size. Hence, the ref. 15300 is not generally referred to as a "Jumbo" even though it is approx the same width as the Jumbo at c. 39mm.

Så navnet stammer altså iflg. denne kilde fra en kombination af størrelse og værk.
Al denne research er nu ret interessant