Different Grades of the Model 1897[10] Grade Gauge Barrel (inches) Production dates Remarks
Standard 12,16 30,28 1897-1957[11] Plain walnut stock with steel buttplate
Trap 12,16 30,28 1897-1931[11] Fancy walnut with checkering
Pigeon 12,16 28 1897-1939[11] Same as Trap, but hand-engraved receiver
Tournament 12 30 1910-1931[12] Select walnut; receiver top matte to reduce glare
Brush 12,16 26 1897-1931[11] Shorter magazine, plain walnut without checkering, solid frame
Brush Takedown 12,16 26 1897-1931[11] As above, but takedown frame
Riot 12 20 1898-1935[11] Plain walnut, solid or takedown frame
Trench 12 20 1917-1945[13] Same as riot gun but with heat shield, bayonet lug, and sling swivels
That is the TRAP grade............The TOURNAMENT grade only came in 12ga.