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 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:

Timex Electric Dynabeat Model 254.

Timex Electric Dynabeat Model 254.

Timex Electric Dynabeat Model 254.

Timex Electric Dynabeat Model 254.