Oris TT1 Day Date Lefty (reference 635 7519 44 94)

In this Oris TT1 watch, the screw-down crown is placed at the 9 o’clock position – on the left side of the watch.

The massive stainless-steel case with a diameter of 42 mm is also in a class of its own, with its aerodynamic lateral curvature and its sporty matt surface. The curved sapphire crystal fits elegantly into the vulcanized black rubber top ring.

The watch is equipped with the Oris 635 self-winding movement with a power reserve of 38 hours. Introduced in 1999, this calibre is based on ETA 2836-2 movement.

Oris TT1 Day Date Left Handed (reference 635 7519 44 94)
Oris TT1 Day Date Lefty Reference 635 7519 44 94 RS, Image Credit: ORIS SA

This Oris TT1 Lefty features a matt-black relief-structured dial with centrally placed hour, minute and seconds hands. The day and date window is placed at 6 o’ clock.

The mineral crystal glass on the caseback allows the view of this movement.

Technical details

Model: Oris TT1 Day Date with rubber top ring and crown on the left

635 7519 44 94 RS/ 42 mm
635 7519 44 94 MB / 42 mm

Stainless-steel case with a diameter of 42 mm
Screw-down crown at 9 o’clock position.
Case top ring with scratchproof curved sapphire crystal, embossed stainless-steel back with mineral-glass window
Water resistant to a depth of 100m

Cal. Oris 635, base ETA 2836-2,
Ø 25.60 mm, 11 1/2”’
Bi-directional automatic winding, ball bearing
25 jewels
28,800 A/h, 4 Hz
Power-reserve: 38 h
Fine timing device and stop-second
Centre hands for hours, minutes and seconds, individual date and day windows, instantaneous date and day, date and day corrector

Matt-black relief-structured dial, black shining Arabic numerals
Date opening and week day window at 6 o’clock

Vulcanized black rubber strap with vertical tire treads and hidden butterfly buckle with lateral pushers and safety clasp