A tie pin, made the same way as the above.  It too has a facsimile of Studdy signature on the back.

 A different style of enamelling, this one is painted onto a base metal and then clear-enamelled.  On it's back is stamped 'Copywright  Czecko-Slovakia'

 This badge is made in the same way as opposite, but is unmarked on its back - though it was probably made by the same manufacturer.

 This one is just made from a non-descript base metal with a brown metallic enamel painted into the mould.

 Made very simply from pressed tin and finished with a blue wash in its recesses, this one comes from Czechoslovakia.

This great pair of badges were made in a very limited number in the mid 1980's by, I believe, an art student to commemorate the 100th edition of a publication called 'Music Talk'.