Caravelle was a brand owned by Bulova.
The 12 OUCD movement is of the Fixed Coil, Transistor Controlled Balance variety and is the same as the Citizen 4830. Both movements are related to the ESA Dynotrons (9157, 9158). In fact, you can clearly see the “LIC. ATO” on the 12 OUCD plate below; this acknowledges their technology inheritance with the Dynotrons.