That system is called 'batchelor's buttons' with the split rings - I am not sure if the other fixings come under the same term.
I'm not sure if the shank is horizontal or vertical in it's correct orientation - if it is horizontal how about using split pins - and if vertical, paper clips?
P.S. To prevent a reaction, coat the metals with varnish - nail varnish will do, though a toning shade or clear is advisable.












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