I agree that this gun is the Fig 67 Victoria model. Note that it is listed in the 1891 catalog in three grades, so one may well find variations. The Figure 67 gun is listed in the 1914 catalog at 20£ and has lost the "Victoria" name while retaining the oak leaf engraving pattern. The "Victoria" is listed as Figure 163 at 30£ and one grade only sans oak leaves and it has a square bolt. The cheapest hammer gun is 12£, 30-40£ seems to be middle of the road and the "Premier" lists at 68£ plus 8£ for steel barrels.

A very cool gun!!