Original vintage window catalog UNIQUE BALANCE COMPANY sash balances for double hung windows. A true counter balance not a friction device. Differences between springs, other sash balances and the Unique sash balance, how it operates, typical frame details, types of bay and mullion window details, grooving for balances and specs, economical construction details given. Main office was located at 25 Bruckner Boulevard, Bronx, New York City, NY. This old eight page 1956 architectural specifications brochure would make a marvelous addition to your engineering library. Pages are loose.
- SKU zg807
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