This clock appears to be made of brass and silver. Thank you, Lydia Click here for the appraisal. Yours though has too many difficulties for the average collector. First the missing second, or sweep, hand is a large concern. Also, the excessive wear to the silver plate would lead one to believe that this clock has not been well cared for.
Collectors always prefer clocks in good working order.
Before discarding, see if a clock shop might pay a modest sum for it as a parts clock.