O Scale! 8PK 4 LH & 4 RH PRR Style Pneumatic Switch Machine

N Scale version shown, photol by Keystone Details

O Scale Model!  For the O Scale folks, these PRR Style pneumatic switch machines make a great lineside detail for your Layout.  Set includes four left hand and five right hand machines.  Combine these with the O scale version of Keystone Details Pneumatic Air valve for extra detail: