Earliest version below with six spoke wheels, lightening drive rod, single window. Somewhat later above

Circa 1914-15 - 6 spoke drivers, single window, single boiler band. This No. 11 tender is approximately the same date and even though the No. 6 was cataloged with an 11 tender after 1917 - this would NOT be the correct tender as it has automatic couplers and any of the cars that came in sets with a No. 6 would have had hook couplers. The correct tender for this loco would probably be a No. 1 from this period.

Probably 1914 with 10 spoke drive wheels, straight rod, and NO piping

Circa 1915 to 1916 with DOUBLE window and boiler piping