A Heuer Chronograph with a dash mount. A useful tool in rallying and car orienteering to time the transitions and stages. Tommi 9.10.2014, 20:55 Full size 1000 × 563 pixels A Heuer Chronograph with a dash mount. A useful tool in rallying and car orienteering to time the transitions and stages. Previous imageHalda Tripmaster and a Twinmaster for car orienteering. Used to measure precise travel distances. Next imageA Saab Sport speedometer. I was wondering about the changed markings on the back. A fellow car enthusiast pointed out that it probably means the final ratio was changed. I think the final ratio was changed from Saab Sport ratio to the regular Sedan ratio to use the gauge in a normal Saab 96. Leave a Reply Cancel reply Your e-mail address will not be published. Required fields are marked *CommentName* Email* Website Save my name, email, and site URL in my browser for next time I post a comment. Notify me of new posts by email.