Originality
Originality matters on this reference. An original dial and hands command a significant premium. Service replacements typically trade at a 20-40% discount to original examples.
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Authentication
Index alignment and pusher condition determine authenticity on the Chronoscope.
- Applied indices on the Chronoscope must be precisely aligned; any tilt is a defect.
- Chrome plating loss on pushers is a cosmetic issue but affects value.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | Applied index alignment | All indices precisely seated; sub-register text centered within each circle | Any index tilted; sub-register printing off-center |
| case | Pusher condition | Original-style pushers with no chrome plating loss; clean return after each operation | Chrome plating loss; non-original pusher style; sticky return |
| caseback | Cal. J880.1 designation | J880.1 engraved; ETA Valjoux 7750 base with Junghans finishing | Non-Junghans caliber designation; generic 7750 without Junghans finishing |
- Pushers; OEM parts required to maintain Bauhaus aesthetic.
- Crystal; anti-reflective coating must be maintained.
Authentication guide
The Max Bill Chronoscope is a flyback-capable chronograph in the Max Bill aesthetic. The Valjoux 7750 base (J880.1) gives it a column-wheel automatic chronograph movement, which is a significant specification at its price. Dial restraint is the same as the 3-hand Max Bill: no extraneous text.





