Auricoste Spirotechnique Marine Nationale Issue

An unusual and attractive vintage diving watch with  historical background - French Navy diver watch. The case back shows Marine Nationale serial number 1100B as well as the reference number. 

Maker: Auricoste
Model: Spirotechnique
Reference: 906.21.05
Year: 1990s
Case Diameter: 42 mm
Case Height: 12 mm
Case length: 47.5 mm
Lug Width: 20 mm
Movement: ETA 2824-2, automatic. Quick-set date
Case material: Stainless steel
Crown: Screw down
Crystal: mineral
Lume: Tritium
Bezel: Uni-directional, indexed  w/ 60 clicks.
Water resistance: 200 meters
Bracelet: Erika’s Original – new

Condition:

Case: shows some wear, it seems to be in an unpolished status
Glass: nearly perfect
Dial & hands: The matte black "Spirotechnique" dial is in flawless condition, hand set perfect condition
Bezel: minimal wear and greyish black in coloration and retains its tritium pearl at 12 o'clock position on the bezel
Crown: unsigned original crown
Movement: The watch is functioning and keeping time perfectly, previous service history is unknown