![A Swiss made Thommen precision mechanical analogue altimeter. Calibrated to 6000 metres Stock Photo - Alamy A Swiss made Thommen precision mechanical analogue altimeter. Calibrated to 6000 metres Stock Photo - Alamy](https://c8.alamy.com/comp/M8XN2F/a-swiss-made-thommen-precision-mechanical-analogue-altimeter-calibrated-M8XN2F.jpg)
A Swiss made Thommen precision mechanical analogue altimeter. Calibrated to 6000 metres Stock Photo - Alamy
![Thommen Altimeter — Collectibles | Discover unique and rare auction treasures | lot 784, catalog Art and Antiques, collection of historic musical instruments Thommen Altimeter — Collectibles | Discover unique and rare auction treasures | lot 784, catalog Art and Antiques, collection of historic musical instruments](https://veryimportantlot.com/assets/image/picture_97620/6da4b/gkrznsi6gnup7ecpk3bobsprd8qd4hx1q-gy1ophenyfvijw6e5tz-6srvqwr1518106356jpg__fix_1280_828_fit.jpeg)
Thommen Altimeter — Collectibles | Discover unique and rare auction treasures | lot 784, catalog Art and Antiques, collection of historic musical instruments
![A Swiss made Thommen precision mechanical analogue altimeter. Calibrated to 6000 metres Stock Photo - Alamy A Swiss made Thommen precision mechanical analogue altimeter. Calibrated to 6000 metres Stock Photo - Alamy](https://c8.alamy.com/comp/M8XN1Y/a-swiss-made-thommen-precision-mechanical-analogue-altimeter-calibrated-M8XN1Y.jpg)