The GRUSS decompression table, which attaches to the wrist, works on the principle of parking discs. Its only flaw is written a bit small ... Date of the 50s.

A very pretty and very rare item, the Z14, a combined compass / capillary depth gauge from the early 1950s. A precious collector's item because it is new with its box, the only one known to date in this condition.

The ALBATROS compass for spirotechnics, a highly sought-after piece, the first to be marketed by the brand in the late 1940s.

The spherical VZ compass developed by Serge Vez in the early 1960s. A superb new collector's item with its renowned box.

The spherical VZ compass developed by Serge Vez in the early 1960s. A superb new collector's item with its renowned box.

Compass made by Ben and Bianchetti for spirotechnics. It is new, it is a relatively difficult part to find. Both military and civilian use in the 1960s.

Compass of the Swedish brand SILVA marketed by La Spirotechnique I think at the beginning of the 80s, if someone can bring me additional information it would be welcome.

80m depth gauge of spirotechnics with dragging needle from the 80s, early 90s.

Military depth gauge 80 m with its "7,5m" sight for closed circuit dives with pure oxygen.

Standard military depth 80 m.

The famous 16m depth gauge for commandos, or the 7.5m target for closed circuit diving is the famous "noon".

The 120m military depth gauge, a relatively difficult piece to find.

Standard military depth gauge 80 m with reset button on the side.

Standard military depth gauge 80 m with dragging needle and reset button.

Standard military depth 80 m with dragging needle.

Depth gauge Z 30, 80 m version. I call it type A dial, that is to say with big dots from 0 to 10m and MADE with IN FRANCE below. The number 40 is not a continuation of the graduation. This is the first series of Z 30 depth gauge released at the end of the 1950s, the bracelet also has a faux leather texture.

Depth gauge Z 30, 80 m version. I call it type B dial, that is to say with big dots from 0 to 10m and MADE IN with FRANCE below, the number 40 is not an extension of the graduation. This series was probably released in the late 60s, if anyone has more information it is welcome.

Depth gauge Z 30, 80 m version. I call it type C dial, that is to say with small dots from 0 to 10m and MADE IN with FRANCE below, the number 40 is an extension of the graduation. This series was probably released in the early 70s, If someone has more information it is welcome.

Depth gauge Z 30, 80 m version. I call it type D dial, that is to say with large dots from 0 to 10m, they are well spaced so as to put the 15m to the right of METERS. The MADE IN with FRANCE below, the number 40 is not a continuation of the graduation. This series was probably released in the early 70s, If someone has more information it is welcome.

The depth gauge Z 30 120m version. I only know one version, but maybe there is another version of the dial? I appeal to other collectors.

The DELTA depth gauge 120m version, quite difficult to find. Type A with flat glass, depths 3, 6 and 9 m are indicated by segments. This version is not very easy to read underwater.

The second version of the DELTA depth gauge in 120m. Type B with curved glass. The depth is graduated every 2 m from 0 to 20m by points. It is much clearer to read underwater.

The 80m DELTA depth gauge, quite easy to find. Type A with flat glass, depths 3, 6 and 9 m are indicated by segments.

The second version of the DELTA depth gauge in 80m. Type B with curved glass. The depth is graduated every 3 to 12m by dots and segments indicate the steps 3, 6, 9 and 12m . Of all the analog depth gauges in La Spirotechnique it is the clearest to read underwater.

The second version of the DELTA depth gauge in 80m. Type B with curved glass. The depth is graduated every 3 to 12m by dots and segments indicate the steps 3, 6, 9 and 12m . Of all the analog depth gauges in La Spirotechnique it is the clearest to read underwater.

Here is a depth gauge that is not from the brand La Spirotechnique but which inspired the mechanism of many models, and for good reason: The original of the Bourdon brand, the Bourdon tube depth gauge.

New, in its box ... it gives the impression of leaving the store! A piece of choice in my collection.