The clamp is to be truly made entirely of stainless dare I doubt, because there is a place (thankfully on the inside) where the surface is easily damaged on two tiny points and a Unterkupferung be seen! I suspect, therefore, that at least the base body made of a cheap material and has either a copper-chromium layer or a copper-nickel layer.
The manuals supplied with the bag and the chain rather poor acting, which lay in the delivery free make this Mägel not bet! I wanted a decent Kravattenklammer and no Schnik-Schnak!
Ultimately actually speaks only the affordable price for the product and is more for opportunity carriers.