The crown and tube assembly used on the original Yantar watches has been troublesome. Sooner or later all will require replacement.
Our crown and tube assembly is custom made to retrofit the Yantar case. It uses a different design that elminates the problem that causes the original assembly to fail.
Note: These parts must be installed by a professional watchmaker. They are damaged easily if installed incorrectly. They cannot be installed at home. We will not accept returns or claims for defective parts on this item.