What shell inpired this scent bottle?

This scent bottle, London 1879, is clearly inspired by a shall - but that shell. I have done the obvious work on google without success. It is only slightly similar to a screw-shell (Turritella), [/img] Can you help me please?

I see a bird’s wing - with feathers.

Thank you. I am clearly getting too old to spot the obvious. BARRY