Thanks Tony. I'd seen the picture in a few contexts before, but that is the most accessible. Being a drawing for a catalogue illustration, I wouldn't read too much into it. It was probably produced before the F&H made one, if anything like other advertisers of the period. The illustration drums up interest, and one is only built if that interest becomes a firm order. In any case, unfortunately it doesn't show any specific detail of engraving style or standard fittings to expect on an F&H cinema console.
I believe the larger (tubular pneumatic) instruments such as the Capitol, Scarborough probably had drawstops, not tabs, but have never seen a photograph of either style.