Aera Instruments C-1vsTissot Telemeter 1938
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

C-1

Telemeter 1938
Diameter
42mm
42mm
Lug-to-Lug
49.5mm
n/a
Thickness
15.8mm
13.8mm
lowest
Water Resistance
100m
highest
30m
Power Reserve
56h
68h
highest
MSRP
$2,950
$2,400
lowest
Movement
Sellita SW510
Tissot Valjoux A05.231
Case
3 specsCrystal & Dial
4 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Aera Instruments C-1 is praised for its excellent, distinctive design that balances tool-watch masculinity with soft, gentle aesthetics. The 42mm case size is considered large, and a smaller option would be welcome. On balance, reviewers highlight the distinctive design as the primary reason for their positive assessment.
Owners and reviewers widely praise the Tissot Telemeter 1938 for its vintage-inspired design, handsome dial finishing, and the value it offers as a mechanical chronograph. The automatic Tissot Valjoux A05.231 movement, with its 68-hour power reserve, is noted positively, and some owners describe the movement as feeling "alive." The watch features a polished stainless steel case, monopushers, and a double-sided anti-reflective coating. However, the 42mm case size is frequently cited as being too large for the retro aesthetic, with many wishing for a smaller variant, and its 30-meter water resistance is considered poor. The pusher feel is described as sharp but slightly stiff, and the average accuracy is reported at +6 seconds per day. On balance, owners and reviewers rate the Tissot Telemeter 1938 highly for its attractive vintage design and good value, despite concerns about its case size.
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