This is part of the third series of Beatrix Potter 50ps, following the highly popular 20 releases that coin collectors loved. Let's explore the incredible story of this unique 2018 special edition 50p coin and learn about its value and rarityīack in 2018, the Mrs Tittlemouse 50p coin was released by the Royal Mint to celebrate the of Beatrix Potter's most loved children's tales, 'The tale of Mrs Tittlemouse’. In this article we'll learn all about the 2018 Mrs Tittlemouse 50p coin issued by the Royal Mint to commemorate this amazing book by Beatrix Potter – but is this coin rare and how much is this coin worth today? Thomasina Tittlemouse as she maintains her home despite unexpected guests. This book follows the journey of a wood mouse named Mrs. Tittlemouse is a book by Beatrix Potter, illustrated and published by Frederick Warne Company in 1910.