This is the Northwest Short Line Genuine Power replacement motor for the retired Sagami 16309-9.
It has a 1.5mm shaft as opposed to a 2.0 shaft but other specs remain about the same.
New NWSL Flatcan Motor # 1630D-9 (16mm x 30mm with a 1.5mm Double Shaft.)
Re-power a Roundhouse Shay and other similar size locomotives.