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The Form C takes the clean round geometry of the Form A and adds a chronograph. At 41.7mm it wears large but the dial layout keeps three registers from feeling cluttered, which is harder than it looks on a round case.
Junghans launched the Form line as a contemporary counterpart to the Max Bill collection, sharing the same Bauhaus-informed restraint but moving away from the Max Bill's distinct rectangular and cushion shapes. The Form A established the round case vocabulary; the Form C extended it with chronograph function using the proven Valjoux 7750 base. Introduced in 2018, the reference 027/4731.00 slots above the Form A in the lineup and targets buyers who want stopwatch capability without stepping into the more polarizing Max Bill Chronoscope case.
Junghans has kept the dial execution simple: applied indices, no date crowding the layout, and a subdial arrangement that reads quickly under use.
The 41.7mm diameter is a real 41.7mm, not a modest-wearing one. Buyers coming from smaller dress watches should check the lug-to-lug before committing. The crown at 3 o'clock sits between the pushers and can feel tight to operate, particularly for larger hands.
Dial color consistency has varied across production runs, so buying new from an authorized dealer is the safer path if color matching matters to you. The steel bracelet option, when ordered, has drawn criticism for its clasp feel relative to the price; the leather strap configuration is the better daily-wear choice. Water resistance is rated at 50m, which covers incidental exposure but is not a dive spec.
New, the Form C 41.7mm sits in the 900 to 1,100 EUR range depending on the dealer and strap configuration, which is fair money for a German-finished watch on a Valjoux 7750. Pre-owned pricing runs roughly 600 to 800 EUR in clean condition. The chronograph premium over the Form A is modest, and the secondary market is thin enough that patient buyers find good deals without much competition.
The J880.4 is Junghans' designation for the ETA Valjoux 7750, a robustly supported caliber with a wide network of independent watchmakers. Service intervals of five to seven years are typical, and parts availability is not a concern. Any watchmaker comfortable with column-wheel chronographs can service this movement without needing to send it back to Junghans.
Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal — the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.
Sub-register printing centering and pusher return quality are the two auth checks on the Form C.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | Sub-register print centering | Printing precisely centered within each register circle | Any off-center printing; text bleeding outside register circle boundaries |
| case | Pusher return | Both pushers return cleanly after each chronograph operation | Any pusher sticking or incomplete return |
| case | Arched Form case profile | Same arched case profile as Form A; correct depth and curve | Flat or incorrect case depth; does not match Form series profile |
