Looks like my invoice says Clear Matte and Black Matte. 0.625 would have 1/8" less space between adjacent knobs than 0.500" Personally I'd rather have that extra space, so my fingers don't bump adjacent knobs if I'm really sweeping (twirling) a knob through its full range. YMMV.

And here we have the new knobs in black. It is confusing that the center detents don't point straight up (photo below), even with rather expensive precision machined knobs. I think the detents of pots themselves must have manufacturing variability.

I think these are they (but I'm away from home and can't check my invoice, so please don't go buyin them without doing your due dilligence): https://www.digikey.com/en/products/detail/kilo-international/OEJA-50-3-7/710793...

The detents of both the knobs and the pots seem to be inconsistent how closely they point straight up to 12 o'clock. All the knobs in the image below are at their center detent. New knobs were clearly the order of the day! but the new knobs don't all point straight up, despite having set...