I have a Waltham hunter with a Dennison Moon case. It is marked "Made of two plates of 10ct gold with plate of composition between".
Looking on the web there are various opinions most of which suggest that this is gold plate or gold filled.
The plates have no hallmarks.
To my simple mind "Made of two plates of 10ct gold" means made of 10ct gold.
Am I wrong and was this clever marketing by Dennison?