I recently was able to purchase a nice watch collection in the midwest to offer here.  The collector was all about his watches and took very good loving care of them. Not only did he have great pocket watches, but he had many good pocket watch parts and accessories.  Here is some information about this part:

Brand: Unbranded

Compostion: Marked Silver with black glass or stone

Approximate size: 24mm tall

Base measures: 22mm X 17.5mm

 Thanks for looking. Please take a look at all the other clocks and watches I have this week and weeks to come as well as my store inventory. I am telling you this, because I will gladly combine / reduce shipping whenever possible. No international bidders without prior approval. International shipments must be sent registered mail and insured. Please feel free to ask questions or request additional pictures. All watches and clocks are tested at time of listing and rechecked when shipping. The post office can be unkind to vintage timepieces during shipment. Because of this I package items better than necessary to insure a positive experience. Condition of clocks and watches are all documented with photos and video prior to shipment. No International bidders without prior approval. All international shipments must be registered and insured. No Customs fees are included in the shipping quotes I give. Also I cannot be liable for delays at customs checkpoints. No Shipments to Italy ( sorry ) Thanks for looking and have a great day