Early "124" number (same number on original key). Very nice condition; unusual lock mechanism by Cotterill works smoothly/well. Also unusual bitted key. Maker's name details stamped on lock, key and shackle.
Drop is held in position over keyhole by a spring stub. Brass case has 3 neatly located screws around edge; presumably to allow circular top plate to be removed for demonstration/exhibition use. Lock was purchased from major private collection sale at Sothebys, London - a rare lock.
Size 5" (13cm) long x 3.1"(8cm) wide x 0.9"(2.2cm) deep. key 2.4" long.
On 25-Jun-10 at 19:54:39 BST, seller added the following information:
Please note correction to approximate age of lock is c.1869 in place of c.1846 - apologies. - eBay (1 July 2010)
This padlock had a high bid of 1,133 British Pounds/$1,720.91 (Plus 13.50 Pounds Shipping).