Omas sold at a premium over Campagnolo back in the day. Their quality was always top notch. Their BB, headsets and hubs all weighed less than Campagnolo and were very long-lasting. I have a bike fitted with a full selection of Omas components.

Big sliding is without a doubt a poor English translation. I believe they wanted to indicate on the box "grande scorrevolezza" which using a direct dictionary translation would be rendered as "big sliding" whereas a more appropriate translation should have been "super smooth" referring to how the parts worked, or "Great smoothness". I have never been convinced that this was meant to be a model name but rather a description of the part.