Systron Donner TPZD6-8 OV Manual
YEAR: 1970
ITEM: Manual/User's Guide
COMPANY: Systron Donner
COUNTRY: U.S.A.
IN OUR COLLECTION: Yes
Manual for the Systron Donner TPDZ6-8 OV. Includes large 44"x34" schematic foldout. Schematics state "Trygon Electronics. Roosevelt, New York". Size: E, Code Ident No. 09206, 10403, Rev. J. Drawn: R. Cancel 2-16-70, Checked Greg D'???? (can't read the signature) 4-15-70. The revision notes are dates from 5-15-70 on revision A, through 6-28-74 on revision J.
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One of a Kind: Only known existing item.
Exceedingly Rare: Only 2 to 10 known to exist.
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Rare: Only 26 to 50 are known to exist.
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Available:Can be commonly be purchased.
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(For comparison: Many people consider the Apple-1 computer to be rare. As of 2025 there are 92 confirmed and probable Apple-1 computers.)
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