Pewter frog tie slide, tie clip The pewter Tie Clip is hand cast by William Sturt in lead-free Fine Pewter which has a wonderful deep luster & needs no upkeep - it won't tarnish. We use top quality boxes, so if you are buying a gift, you can be sure it will not disappoint you. All our work is guaranteed by William for life. William has been working with pewter for twenty years, having first learnt the skill from a master pewter craftsman who specialised in ornate picture frames. His pewter is the highest grade available and is, of course, lead-free and nickel-free, it will not flake or rust or tarnish because no chemicals are used on it and it definitely won't give you an adverse allergic reaction.