We cannot fully confirm wether these gears are NOS, but they show no clear sign of use except for surface rust and shelf wear as is to be expected of 80+ years old steel. The gear surfaces and splines show no sign of any wear. so we assume these gears to be NOS, but are not fully 100% sure.
You may be getting a different gear than pictured sinc we have more than 1
OEM no 689-37B
New OEM: 26318-37