Hi Tim,
My favorite method to identify a Steinway really quickly is to count the plate web cooling holes. Unless the piano has 4, you hardly need to look at anything else.
S-5
M-6
O,L, A -4
B -5
D-8
This piano has 6, which makes it functionally a model M
(I say "functionally" because sometimes the extended case style accommodating the pneumatic player system altered the model name, but this wouldn't affect scaling.)
I've attached page 18 from Chapter 7 of the World-Wide Technical Reference Guide here which shows the scale you're looking for
Email me and I'll send you the entire guide
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Daniel DeBiasio
Technical Education & Support
ddebiasio@steinway.com718-267-3229
Steinway & Sons
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Original Message:
Sent: 03-24-2026 21:26
From: Tim Foster
Subject: Wonky S&S scaling
Hello, I have an old S&S in the shop for partial restoration for a school. It was previously a player, so I'm not exactly sure how the model works with these. Perhaps an L (see pics)? The old rusty strings are not original, as I found the pinblock was replaced at some point (11-ply block). The original scale is not available in the plate, as it was (badly) refinished at some point. I noticed a number of anomalies in the scaling this evening, most disturbing some jumping back and forth between sizes and many unisons had different size wire diameters-- as if someone tried to "transition" between string sizes by splitting unisons. The data below is roughly what I was able to collect:
____________
2 tenor bi-cords
4, size 19
2, 18
12, 17
4, 16.5
4, 16
STRUT
3, 16
6, 15
6, 14.5
2, 14
STRUT
3, 14.5
4, 14
10, 13
____________
If anyone can provide the correct scaling, I would very much appreciate it. Thank you!
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Tim Foster RPT
New Oxford PA
(470) 231-6074
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