Halda Twinmaster; is offered in excellent working condition and in very good condition. This is a Twin Master with metal case and matching knobs. Gears 49 & 138 are fitted. Rallyspulletjes.nl can also supply the gear sets and all other connection materials for your car. The Halda Twinmaster is ideal for classic rallies. Easy to operate and robust are the main features of these instruments. Moreover, a Halda is also a wise investment because they are no longer produced and thus retain value. The well-known Halda Twinmaster and odometer dials came on the market in the early 1960s. The general use of the Halda Twinmaster is to use the upper display for the total distance traveled, while the lower display shows the incremental distance traveled. In this way, the upper display can be used for time measurement purposes, while the lower display can be used for following course purposes. The button on the right side of the Halda Twinmaster can be used to adjust the value in the upper display as described above. Unlike the Tripmaster, the Twinmaster has two counters. The setting option allows you to run them individually or both at the same time. The Twinmaster is a purely mechanical odometer. The scale runs up to 999 KM and 990 meters. The measurement accuracy is +/- 1%! A prerequisite for this is proper calibration of the device. There are about 390 combination options available. You can measure both forwards and backwards. Any other position is zero, so no measurement. Once you are on the road in the rally, you will feel very comfortable with these setting options! Counters are reset to zero by pulling the upper right and lower buttons. In rallies where specified average speeds are covertly monitored, the Twinmaster is the right equipment. This is because one counter is used for navigation and the other for measuring distance per unit time. To get a good idea of the lot, we recommend coming to the viewing day.