The NOMOS Sundial is the brand’s most affordable timekeeper. To know what time it is you set the correct date in the middle ring on the hole, then turn it towards the sun so that light falls onto the hole. A ray of light on the inside of the sundial ring will now show the time. It might not be as accurate as your NOMOS watch, but it is cool nonetheless. I also have it on good authority that it needs far less servicing 🙂 .
Please note that pictured is the version calibrated for the larger Glashütte area; versions for London, Madrid and New York are available upon request.