Size 16 21 Ruby Jewels B&B Case Serial 4,282,506, ca. 1923
(Sorry no better photo from the movement right now)
December 21, 2007, 13:40
Lindell V. Riddle
Andre,
Bunn Specials are among the most popular collector pocket watches.
Your movement 4282506 is from the period just before 60-Hour Motor-Barrel introduction. It also was produced before the "Bunn Special" factory cases so it could very well be original to that very attractive B&B Case. Your case looks very crisp and the overall watch appears to be in great condition.
The only change you might want to consider would be to locate the original style seconds hand. They were often damaged or knocked off the watch when synchronizing with a time source. The hour and minute hands and the rest of your watch looks to be correct.