I have a manual Simpson-Lawrence windlassfor sale at $450 CAD. I have replaced it with an electricwindlass. Works great, but chain counter is not accurate. Gypsy is for 5/16" chain. Located in London, Ont. Photos are available
Looks to be the same Seahorse 513 I have on my Shannon 28. Mine is on its last legs and I have been looking for one to replace it. May be interested in yours if it's in good condition. Sent you a pm.