This is a good quality product. Do note however you get one belt not two as I mistakenly thought from the picture. It should be said that swapping the pully wheel is a very fiddly business. The securing screw is tiny and can only be got at with the aid of a long thin diameter screwdriver. You will need your glasses! Still once you have mastered this the 78rpm's play just fine.
These are first rate bulbs they give a richness and depth to the light in contrast to the clinical white LED bulbs in the rest of our kitchen. They are clearly good quality. It will be interesting to see how long they last but at the moment it's promising.