The watch is one of a batch of 20 issued to the DGzRS in 1981, the DGzRS is the German Search and Rescue organization; somewhere between the USCGS and the RNLI in the UK.
(DGzRS means “Deutsche Gesellschaft zur Rettung Schiffbrüchiger”, or, in English "German Maritime Search and Rescue Service") You can find out more info on the English page of their website https://www.seenotretter.de/en/who-we-are/
Foresta were a small Swiss firm who made watches under contract to stores and wholesalers, rarely putting their own name on their products. Like many comparable firms they made their watches using commercially available parts, the watch uses the same MONNIN case as the early famous HEUER Divers. Caseback inside is marked with " BREVET + 503.305 MRP.SA SWITZERLAND "
Google for "Heuer 503.305" or "Monnin 503.305", to discover how desirable they are.
The unidirectional bezel has an acrylic insert, similar to the early Seamaster 300 ones, the numbers are engraved into the rear of the bezel and then filled with luminous paint, so that no amount of rubbing will cause them to fade. The screwdown crown is protected by large pointed crowns and the sapphire glass is unmarked.
The movement is a Swiss quartz 7 jewel one signed by Harley
The matt black dial is most unusual, with giant luminous Arabic 6,9 & 12 numbers and large white and red striped batons for the remainder, all the numbers have luminous dots at their periphery. The hands are also unusual with a ‘spade’ shaped hour hand and a wide ‘pencil’ minute hand.
The watch keeps excellent time, as one would expect from a modern quartz watch, it has just had a battery change and has been pressure tested to 100m and it passed with flying colours.
Diameter 41.5mm; Lug to Lug 46.5mm; Height 10mm, it takes a 20mm strap and a new black NATO strap is fitted.
£1,500.00 (approx. $1,950.00 US)