Josh has listed a high condition 2" John Dickson & Son
https://www.gunsinternational.com/g...ase-ammo-available-.cfm?gun_id=102365947

[Linked Image from photos.smugmug.com]

The date code 'T' is 1938-1939 and proved for 1 1/8 oz. which is the earliest we've seen at that oz.

[Linked Image from photos.smugmug.com]


A 1946 Joseph Lang 2" proved for 7/8 oz.
https://www.gunsinternational.com/g...on-2-quot-12-gauge-.cfm?gun_id=102352516

Webley & Scott 2". No mention of proof nor DOM frown
https://www.gunsinternational.com/g...ott-2-quot-12-gauge.cfm?gun_id=102319099