New old stock, has signs of exterior age from storage, but it is in fact new never used surplus.
The 2x 3/8" NPTF Threaded inlets show zero signs of mating thread wear/engagement.
Part number breakdown:
Full range of NFPA interchangeable mounting configurations Mounting Dimensions are in accordance with ANSI (NFPA) T3.6.7 R2-1996, Fluid Power Systems and Products - Square Head Industrial Cylinders - Mounting Dimensions.
Series NCA1 Medium Duty Air Cylinder
NC= Series
D = Auto switch (Magnet Piston)
A1= Series
F = Front Flange
150= 1.50" bore size
-0600 = 6.00" nominal stroke length
150 front flange mount is a rectangle with a 2 3/4" wide x 1.43" tall (4x 5/16" diameter) bore pattern
Male Threaded Rod end is 7/16-20 with included retaining nut.