I have a brass cased Zenith chronometre set into a burled wood case. The unit has the Zenith Co. logo attached with a plate on top and ZENITH in brass letters at the base. I think this was used by jewellers in their windows for customers to set their watches to. The clock has a sweep second hand at 6 oclock position and a wind up power reserve at the 12 oclock position. Does anyone know if this clock has worth to a collector and what its value would be?