Illinois Watch Company Bunn Special
Illinois's best-known railroad-grade line; the named 'Bunn Special' grade dates c.1901-1903 through the company's final years (a plain 'Bunn' grade predates it, from the 1890s).
8 references
“Differs” marks a spec with different recorded values. — means not recorded.
| Spec | 18 Size Bunn Special 21 Jewel (Model 6) 18s open-face, full plate, 21 jewel, early Bunn Special grade | 18 Size Bunn Special 24 Jewel (Model 5) 18s hunting case, full plate, 24 jewel, adjusted to temperature, isochronism, and positions | Bunn Special 21 Jewel (Model 9) 16s open-face, 21 jewel, lever-set, double sunk porcelain dial, unnumbered pre-1930 grade | Bunn Special 23 Jewel (Model 9) 16s open-face, 23 jewel, lever-set, unnumbered pre-1930 grade, six positions and temperature | Sixty Hour Bunn Special (Type I, Motor Barrel 60) 16s, earliest 60-hour mainspring variant, marked 'Motor Barrel 60' on the barrel bridge | Grade 163 Type II (Sixty Hour) 16s open-face, 23 jewel, extended 60-hour mainspring barrel, 'SIXTY HOUR' marked on train bridge, extremely rare | Grade 161 16s open-face, 21 jewel, Model 14, adjusted six positions and temperature, numbered grade (introduced 1930) | Grade 163 16s open-face, 23 jewel, Model 14, adjusted six positions and temperature, numbered grade (introduced 1930) |
|---|---|---|---|---|---|---|---|---|
| Case Differs | gold-filled or 14k gold (varies by example) | gold-filled or gold (hunting case) | gold-filled | gold-filled | Not recorded | Not recorded | 14k gold-filled | gold-filled |
| Caliber Differs | 18 size, Model 6, full plate | 18 size, Model 5, full plate | 16 size, Model 8 (hunting) / Model 9 (open face) | 16 size, Model 8 (hunting) / Model 9 (open face) | 16 size | 16 size, Model 14 | 16 size, Model 14 | 16 size, Model 14 |
| Movement type | Manual | Manual | Manual | Manual | Manual | Manual | Manual | Manual |
| Jewels Differs | 21 | 24 | 21 | 23 | Not recorded | 23 | 21 | 23 |
| Power reserve | Not recorded | Not recorded | Not recorded | Not recorded | 60 h | 60 h | Not recorded | Not recorded |
| Dial | white | Not recorded | white | white | Not recorded | Not recorded | white | white |
| Indices Differs | Roman or Arabic numerals (varies by example) | Not recorded | Arabic numerals, Montgomery-style | Arabic numerals, Montgomery-style | Not recorded | Not recorded | Arabic numerals, enamel Montgomery dial | Arabic numerals, enamel Montgomery dial |
| Produced Differs | 1895–1919 | 1895–1919 | 1914–1928 | 1914–1928 | 1924–1926 | 1928–1931 | 1930 | 1930 |