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

The Lufkin Rule Co. Four 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)

STARRETT 13C Double Square, 6 In, 2 Pc/ original box/ fast shipping

Mini Starrett Combo Square

Starrett No. 13 Double Square w/ Additional Blades Machinist

The LUFKIN Rule Co. No. 139-3" 3 x 2 Inch Thin Steel Square. Made in the USA.