Zenith XL-Tronic:
"Zenith Caliber 50.0. Running extremely precise on regular modern battery cells. This is not a Quartz movement but a version of the Bulova patented tuning fork hybrid movements running on 300hz (same as Omega f300hz). This Zenith has the very nicely decorated high grade version of the movement as was also used by IWC and a few others.
It comes with a fresh battery fitted".