Some time ago I attempted to retouch an image of a Rock Chidley label in the same way I'd done a Lachenal label and a Wheatstone label. Sadly the image I had to work with was so poor and of such low resolution that it was impossible to work with. So here's a reproduction label I knocked up earlier today. The fonts aren't quite right and no attempt has been made at fidelity but it does look similar and critically the proportions are correct so provided you shrink it evenly it should fit the aperture of at least one concertina!
So here 'tis, the rocky Rock Chidley label.