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I just came across a table of dates and first serial numbers for that year: 1885-3100 1903-14500 1909-24100 1915-35800 1921-56000 1890-4600 1904-16000 1910-25100 1916-39000 1922-59000 1895-6580 1905-17800 1911-26200 1917-43000 1923-62000 1900-10000 1906-19000 1912-28300 1918-47000 1924-65000 1901-11...

We have an "Adam Schaff" upright which has a serial number 18641 Chicago, the date Sep 14 '26 and the name O O Sprunger. This piece has been around and has had a poor attempt at restoration. Sounds good except for a couple of bad hammers. Any thoughts on its' true date and rarity?

TIA