A late version of a 16 meter depth gauge made by Panerai. The diameter of the case is 70 mm with a height of 45 mm. The lower part of the case is made of black plastic, the upper part is made of black rubber.

Tried to catch some interesting details and design elements of the case of a Luminor depth gauge, which is aimed to 16 meters. On the backside of the depth gauge is a matriculation number engraved (“Matr. No 189″). The membrane (diameter: 23 mm) is placed in the center of the case, surrounded by the company signatures “Officine Panerai · Firenze”. Some types of instruments bear a Panerai reference number (e.g. “Mod. GPF 4/55″, as engraved on a compass caseback) instead of a matriculation number. Other types are totally unsigned without any engravings on their casebacks – a variety of different decorations exists. Some of these unsigned cases bear a matriculation number on the leather strap (hand written).

The stainless steel case is matte grey coated, sized 70 x 90 mm. The instruments use the same 26 mm leather straps as those who were mounted on watches (screwed lugs), specially treated for seawater use. The length of the strap meant that the swimmer was able to wear the gauge over his diving suit. The underside of the instrument is ergonomically shaped and has a brushed surface. It is fixed with 6 screws onto the upper part of the case, same as compasses are constructed. The huge dome (26,5 mm) is made of Plexiglas. The depth gauge has a total height of 43 mm with a weight of nearly 400 gramms.

The meter hand is made of transparent Plexiglas, which has a chamber in its tip, holding the luminous material to point out the actual depth. Gauges with Radiomir usually have a white Plexiglas hand. You can see a group of  Radiomir and Luminor depth gauges here. The center of the dial bears “Luminor Panerai” and below “Metri” is engraved. You can find more details of the tool’s dial here. The luminous material on hands, numbers, markers and dots is still reacting very quickly and bright when a light source is beamed onto the numbers and markers.

More informations about this Panerai instrument can be found in chapter III of our 1st book “Vintage Panerai – Watches with History”.

An interesting “Trittico” (= wristwatch, compass and depth gauge) is up for auction at Christies in their november sale 1383 (LOT 27). 

A rare GPF 2/56 “Big Egiziano” with “Radiomir Panerai” dial, a compass and a depth gauge will hopefully find a good new home on november 14th in Geneva/Switzerland.

Features of the watch:
Reference: GPF 2/56
Dial: “Radiomir Panerai” (sandwich, engraved)
Case number: 018
Movement: Angelus Cal. 240 SF (8 days)

The watch is a close “brother” of the “Big Egiziano” with the case number 012, published in our book “Vintage Panerai – The References” and shows identical features, especially the signed date “12.55″ on the movement plate. The balance cock bears the “SF 240″ sign (Stolz Frères Cal. 240), which can be found on the earlier versions of the Angelus movement (1955 – signed “12.55″), while the movements dated in the 1960’s (e.g. “MAI.61″ or “JUIN.61″) have a “+/-” on the balance cock in the majority, from what we were able to find out by comparing with our database.

All three items of the “Trittico” are signed “OFFICINE PANERAI FIRENZE” on their casebacks. Each item has the complete number of original screws (6 each). All of them appear with their original leather strap and buckle.

The depth gauge is aimed 60 meters and bears the “Radiomir Panerai” sign on the lower part of the dial. All items show signs of use, the dial of the GPF 2/56 has faded into brown “tropic” color.

You can read more about the Ref. GPF 2/56 in our book “Vintage Panerai – The References”, chapter V, pages 256-283.

[Photos with kindly permission / courtesy of www.christies.com]

A load of Vintage Panerai instruments with “Luminor” and “Radiomir” substance; 10 depth gauges aimed for various depths and 13 compasses produced from the 1940s to the 1980s.

Especially rare are the two small compasses, which have been used in World War 2 (left corner of the photo) by german and italian frogmen. Further details about these two rare instruments can be found here [Italian frogmen's compass] and [German frogmen's compass].

[photo by Ralf Ehlers]

A set of vintage “Luminor Panerai” instruments – the so called “Trittico”: compass, Ref. 6152/1 wrist watch and 16 m depth gauge. The depth gauge is calibrated to 16 meters. There exist other versions for various depths, depending on their use (attack or defense; calibrations from 7 to 60 meters are known today). Both instruments, the compass and the depth gauge, have a case size of 70 x 90 mm. The compass rose is divided into 22.5° sections, commonly used in seafaring circles.

Rare find by a friend of us: new old stock spare strap for Panerai instruments like compasses or depth gauges, used by the italian navy as replacement. Typical for this kind of straps are the huge brass buckles, of which plain and numbered versions exist.

“Seven in one strike” - a collection of different Officine Panerai depth gauges, gray coated 70×90 mm cases.

7 meters (Radiomir)
15 meters (Luminor)
30 meters (Radiomir)
35 meters (Radiomir)
40 meters (Luminor)
50 meters (Radiomir)
60 meters (Radiomir)

[photo by Ralf Ehlers]

Tried to catch some details of a depth gauge’s meter hand today. The “Luminor” elements (markers and numbers on the dial, tip of the hand) still glow in a strong green color when under influence of direct light – quite impressive for a tool of this age and very different to the instruments with “Radiomir” elements.

The shown depth gauge is calibrated to 16 meters. There exist many other versions for various dephts, depending on their use (attack or defense).

More informations about this Panerai instrument can be found in chapter III of our 1st book “Vintage Panerai – Watches with History”.

The Panerai Ref. 6154 “Egiziano Piccolo” in good company: compasses, depth gauges and it’s “big brother” GPF 2/56 “Egiziano Grosso” in the background.

Even with an impressive case size of 47 millimeters, the Ref. 6154 watch looks pretty small compared to the instruments around, which have a case size of 70 x 90 mm.

One of the unreleased photos from our 2nd shooting in 2009, showing two Luminor Trittico sets. Similar photos have been used for the first and last inside pages of our 2nd book “Vintage Panerai – The References” in darkness and daylight conditions. 

Two Luminor compasses, two Luminor depth gauges (15 and 16 meters), a 6152/1 “Luminor Panerai” watch with Rolex Type 4 movement (cal. 618 Cortebert, 17 Rubis, Incabloc shock protection) and a 6152/1 “Luminor Panerai” watch with Angelus 240 SF movement (signed june 1961, 15 Rubis, Incabloc shock protection).