Vintage Keuffel & Esser Paragon 1631P Triangular Scale Drafting Ruler

Vintage Keuffel & Esser Paragon Drafting Tools + Wood-Regan 2-Piece Ruler Set

KEUFFEL & ESSER Model 1631P DRAFTING SCALE Paragon

2 Vintage Architect Drafting Rulers Keuffel &Esser (K&E) Paragon, Triangle Ruler

Vintage Keuffel + Esser Triangular Drafting Scale Ruler 56 3648 W/ Case 12”

Vintage K&E Keuffel & Esser Paragon Engineers Triangular Scale 12 Inch

Keuffel & Esser Co. N.Y. Paragon 1631P 12in Engineer's Scale w/Case and Assorted

K+E Keuffel & Esser 1631P Paragon Engineer's Triangular Scale 12” Rule with Case