Most Timex electrics and electronic run at 21,600 bph, but they also had a high beat range that ran at 28,800 bph; this is the Timex Dynabeat range. And once again, the Timex Model 253 has routes based in the Model 40…they look very similar.
- Model 253 : electric : 28,000 bph : no date
- Model 254 : electric : 28,000 bph : date
- Model 255 : electric : 28,000 bph : day and date
- Model 265 : electric : 28,000 bph : day, date and second time zone
My only Dynabeat is a date version, the Model 254: