Here we have a Great Vintage "Minolta M - Auto - B Bellows Focusing Rail with MI Adapter - Made in Japan - Very Hard to Find".   This was reviewed and is corrosion free and operating as intended, even though the end of the rail is loose, and no longer inside the end piece (see photo) . Great used condition (See ALL Photos as they will attest to the items actual physical condition). Make sure you do your research to ensure this works with your set up prior to making the purchase. I have no idea what Makes or Models this works with. 

Please visit my Ebay store at the above link. YES, We do combine items to save you on shipping costs.

Please let me know if you have any questions, and Thank You for your continued interest, support and business.