The Lufkin Rule Co. 6 Inch Double Square

Vtg Starrett Double Square #13C-6-4R Excellent, Slight Storage Wear

LS Starrett No. 13 R4 Grad Double Square with 4" Blade Light Laser Mark (LOOK)

The Lufkin Rule Co. 6 Inch Double Square No. 4 Grad Tempered MINT

iGaging 6" Combination Square & 4" Double Square Set

STARRETT # 14 Double Square Head & 2-1/2" Scale LSS Co. Near Antique in VGC

Starrett 4" Precision Square

VTG Lufkin Hardened Combination Square 2pcs Head & 4" Rule No.4grd Made In USA