This engine part is good for sculpture or other steampunk projects. The small brass circles have some movement within the housing, and a little oil may loosen it up to rotate more freely.
I also accept Bitcoin as payment.
If paying with Bitcoin, please use ‘Other’ as your payment method when checking out, and write that you’d like to pay with Bitcoin in the “Note to Seller” field. Once the order has been placed, I’ll contact you with an invoice containing a Bitcoin amount and an address where you can send payment.