Are parts still available for a Senator Floor Clock made by The Daneker Clock Co, Inc. I note in one of your other responses that the business burned down back in the 1960's. The small metal part missing is associated with the pendulum suspension system.
If so, are parts & service available in the Houston, Tx. area
Daniker did not make the movement. They only made the case. You probably have a German movement, perhaps a Hermle. I sell Pendulu Suspension Springs on my website at: http://www.norkro.com/webpages/sspage1.htm In the middle of that page are the Hermle suspension springs. If you give me the numbers stamped on the clock movement I'll help you identify the correct spring.
norkro.com clock parts and repair