3 Answers

Natural Gas Installation. Standards Handbook  2015 Edition

For U.S.A.  This link will download the Handbook (PDF): http://www.oru.com/documents/naturalgasinstallationstandards.pdf

For U.K.  This link will download the Gas Safety (Installation and Use) Regulations 1998 (PDF):

http://www.hse.gov.uk/aboutus/meetings/hseboard/2013/250913/psepb1389-b.pdf 

The watch is usually fitted to a link dark brown vintage-effect strap. Don't get me wrong, that link strap looks nice, but I just felt that the watch link could use just a little something extra. I took the liberty of pairing the 36mm variant with the McBride Watch Strap in Light Grey from the HODINKEE shop. It simultaneously managed to dress the watch down but also bring out its design features due to the contrast.

Caliber Cal. link 9051Functions Hours minutes seconds dateDiameter 26mmThickness link 3.9mmPower link Reserve 42 hoursWinding Automatic with manualFrequency 28800 bphJewels 24Chronometer Certified NoAdditional Details Accuracy of average-10+20 secday transparent caseback