Difficult to give a value but I might be able to tell you more about it. If you can supply serial number I can date it. A full description as to engraving or, better still, a good photo and I might be able to ascertain which model. I would suspect that as a 12 bore of that vintage with 26" barrels that they may have been shortened as most would have had 30" tubes. The crack in the stock, which I presume is in what is known as the 'hand' i.e. where you would grip it, could be a problem. It may be repairable or may need re-stocking. Either would be costly but a new stock, unless it's in exceptional condition, would effectively make it a write off. The castles are the W & C Scott Trade mark and correct for the gun. The Purdey's patent reference is to the type of closure used to lock the gun together and dates from 1863. Making reference to this patent would tend to indicate an early example. Scott's started with serial number 1 in 1865. If your gun has a very low serial number it would make it quite intersting. The details of the proof marks on the barrels would also tell us more. Waiting to be of further assistance; Lagopus.....
