Only wear for maximum of 2 hours per day to stay safe, which is a bit sad. Who would imagine such an innocent looking classic watch being so lethal? The classic Longines "pilot" watches are great for two hours airborne per day!

I have not worn this 1957 G-P 7317 for well over two years and do so sparingly now because its radioactivity is high. 1 inch away, my Geiger counter records 7µSv/hour! Is that worrying? I thinks so and I store the watch in a lead-lined box. However, I can

The Gyromatic Ref. 7317 was one of GPs best sellers and was a huge success in the late 1950s - early 60s. At first glance it is just another 3-hander, but there are many details (I mean, look a these case bevels!) that you only notice at a second glance t

As soon as my Ref. 7317 from eBay arrives I'll post it in a separate thread, but at first is has a long way from the USA to Europe and customs in between. The pictures were crappy but it still had the original crystal with the internal date magnifier loup

On this forum I had expressed my concerns about the radioactivity emanating from my G-P ref: 7317 Gyromatic. I store most of my small watch collection on cushions in individual wooden boxes with hinged transparent lids that all fit neatly together, twelve

Here's mine on a brown lizard strap. Makes my fingers sore to change the date although I do have a crown turning tool, which helps. Turning the crown in either direction moves the date backwards or forwards, so maximum date change need only be 16 days. Lo

When the weather is like this.... Its an easy decision to stay indoors and take photos of watches instead of going out in the freezing cold... Resulting in a fresh shot of the Girard-Perregaux 7317 on Swedish stones! Stay warm! Best Blomman

My Gyromatic ref: 7317 will change date backwards and forwards by the crown turning through 24 hours at a time either backwards or forwards - tedious but slightly less than some other slow forward-only date changers eg Omega calibre 561. It was 1957-58 I

Here is a link to a post I wrote about the 7317: www.watchprosite.com A great vintage watch for sure! Best Blomman