Type 4

Ressence's solar-powered oil-filled reference: the Type 4 combines the ROCS 4 module with an integrated solar cell that powers an e-Crown complication while the mechanical movement runs continuously. The oil-filled upper chamber carries the same no-parallax display as the Type 3; the 44 mm titanium case adds 30 m water resistance. Ressence's most technically dense standard-catalog piece.

Year introduced: 20161 reference

References in this family

Ressence Type 4 · Type 4
enthusiastmodernCustomised ETA 7001 + ROCS 4 module (oil-filled chamber, integrated solar cell for e-Crown functionality)44mm2016–present
Open

Which ref to buy

The Type 4 uses solar charging to power the e-Crown setting system, eliminating the battery replacement requirement from the Type 2 concept. The mechanical movement is still self-winding; solar charges the electronic setting module only.

1
Ressence Type 4 · Type 4Consider
Type 4 -- solar-charged e-Crown eliminates the battery concern from the Type 2.
The case for it:
Solar charging the electronic module is the correct engineering solution to the Type 2's battery dependency. If you want the e-Crown convenience without the battery replacement concern, the Type 4 is the better answer.
Consider instead if:
The Type 4 is the most complicated and expensive Ressence. For most buyers, the Type 1 is the purer expression of the brand concept at a better price.
Open

Rankings last reviewed 2026-06-07. Editorial perspective only. Not financial advice.

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