Jeweller’s delight style silver chain

This is a gift for my wife.  The book on chains I used as the basis for the design calls it ‘jeweller’s delight’, because it looks good and is relatively easy to make.  True – especially as the way I made it was simpler and more effective than the method in the book.  Here’s the chain and a close up showing the plate whose sole function is somewhere to put the hallmarks.

Each link is about 25mm long.  The links and the plate are fine silver, but the lobster catch is sterling.  That’s why the links are brighter than the catch.  However it is only hallmarked as sterling silver.