Yes, absolutely, please do! We'd be very grateful to receive your locking pin back from you for recycling into new clock assembly. If you ordered directly from Bramwell Brown, we can also issue you with a £2 refund on your order to cover the postage. Do, however, make sure to include your order number if so. Please also put the locking pin into something more robust than an ordinary envelope as otherwise it is highly likely to fly out somewhere along the way!
The address to post it to is: Bramwell Brown Clocks, Makerversity, Somerset House, London, WC2R 1LA