Circa 1901-1902 - Earliest No. 17 with cast in boiler bands, cast iron 'dished' wheels and that funky brake only found on the very early 17s and 25s. Note that these first series Locomotives have black-painted side plates.

Similar first series No. 17 with 'T' tender hook.

Underneath of No. 17 showing early motor

Earliest  No. 17? No brake, but looks like there was one. Note the extra piece of casting under the cab and the 'skirt' that drops between the two wheels.  We have not seen another early 11 or 17 with these features, but this is the way it was shown in the catalog in 1901. The No. 17 shown in the 1901 catalog shows the brake more elongated and resting over the top of the wheel - see catalog cut below.

Here's another early 17 that has the 'T' shaped tender hook, but no 'skirts'