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**Up for sale is an authentic, original New Old Stock (NOS) vintage 1991 factory set of New York Steinway & Sons Model D (9\' Concert Grand) hammer heads.**Preserved in its original labeled factory box with period newspaper packing dated January 22, 1991, this set offers rare, ironclad date provenance. Sourced directly from a veteran concert technician\'s personal workshop inventory, these heads are 100% unused, unhung, unglued, and unplayed.---### Specifications & Factory Details
* **Manufacturer:** Steinway & Sons (Long Island City, New York)
* **Scale Application:** Model D (8\' 11-3/4\" Concert Grand)
* **Factory Part Designation:** HAMMER STYLE \'D\'
* **Date of Provenance:** January 22, 1991 (original packing newspaper included)
* **Bore Status:** Factory Pre-Bored 7/32\" — Pre-angled and stepped for direct hanging on standard Model D shanks
* **Molding / Numbering:** Original hand-penciled factory note numbering intact on the molding tails (e.g., #66–#80)
* **Reinforcement:** Factory brass wire stapled underfelt/crown construction
* **Condition:** New Old Stock (NOS). 100% unhung with clean bores (zero glue residue) and virgin felt crowns (zero string marks, filing, or needle work).
