Vintage 1631W KEUFFEL & ESSER 12" Triangular Scale Drafting Ruler w/Bruning box

Vintage Bruning Scale Ruler 1268 With Keather Sheath

Vintage Charles Bruning White Plastic Drafting Machine Ruler with Case

Vintage 12" Bruning Metal Drafting Ruler - attachments on back

Vintage Dietzgen Engineer’s 12 in. Triangular Scale Ruler 1667BP USA

Vintage Bruning 2126P Triangular Engineer Scale Ruler 12” Drafting Tool

Aluminum Triangular Architect Ruler w/Laser-Etched Imperial Drafting Scales 12"

Vintage Bruning Drafting 18-1/2" Machine Scale Ruler Clear Plastic Yard Patent