It is definitely worth spending the few zlotys more to buy a decent SKF bearing, than if you choose a little cheaper Moretti bearings for our already vintage PRL toys. :) There is definitely a difference in quality! Because I had the option of both such bearings to compare. I definitely recommend such SKF! :)
The bearing super performs its function. The product as described. Fits the Yamaha like a glove. The bearing conforms to the given dimensions. Best regards:)