Vintage Diwa Rietz Pocket Slide Rule Zurn Industries Promo w/ Case Denmark

Diwa
Vintage Rietz Pocket Slide Rule Zurn Industries Promo w/ Case
Size N/A

A collectible vintage pocket slide rule manufactured by Diwa in Denmark. This piece was a promotional item for Zurn Industries, Inc., specifically their Erie City Energy Division for Steam Generating Equipment, adding a unique piece of industrial history to this classic calculating instrument.

• Rietz system slide rule with multiple scales (K, A, B, CI, C, D, L)
• Promotional branding for Zurn Industries on the case and back of the rule
• Celluloid/plastic construction with clear cursor; Made in Denmark
• Measurements (approximate, taken flat): 6" length
• Includes original stamped dark brown protective sleeve/case

Condition: Excellent vintage condition with minimal signs of use. The rule itself is clean, all markings are crisp and legible, and the cursor slides smoothly. The case shows minor storage wear consistent with age, which adds to its authentic character. No cracks or significant damage.