Semi-Skeleton                                            

The “d.freemont” ref. # 16601 with the open balance area for viewing , nick-named the “Semi” is powered by an altered ETA 2824 –  automatic 25 jewel movement.  The standard top plate is removed and replaced with an engraved balance bridge. This is a fine reliable movement even in standard form; however, “d.freemont” adds value by specifying the Glucydur balance and the Nivarox hair spring.  These up-grades provide superior resistance to magnetism and variations in temperature change.  

Adding value to the “Semi”…”d.freemont”  makes use of a common feature of this ETA movement.  The 2824 – has a hack feature ( permitting the second hand to be stopped by retracting the crown ).  This is a holdover from the military watches of the Great War, which permitted synchronizing watches between field commanders and artillery attack planning. The sweep second hand, if stopped at the 12 o’clock position, serves as a “ Semi “ stop watch.  There are two calibrated scales: the telemeter from 12 o’clock to 3 o’clock, and the tachymeter from 9 o’clock to 12 o’clock.  

The telemeter scale is calibrated in miles – with this scale an opposing artillery commander could get the gunnery range by timing the flash of a cannon to hearing the report.  For example: with the sweep stopped at the 12 o’clock position the field commander could start the timing by pushing the crown home the instant he would see the flash from a cannon in the distance – then upon hearing the report, he would retract the crown and read the calibrated scale which would give the distance of the opposing artillery.  This feature can also be used to judge the distance of an approaching storm by comparing lightning flashes to thunder. 
The tachymeter scale is calibrated in miles per hour.  The “Semi” can check the accuracy of a speedometer by stopping the second hand at the 12 o’clock position…. then, starting the second hand by pushing in the crown just as you pass a measured mile-post, such as those found on interstate highways.  The crown would be retracted at the instant you pass the next mile-post… the sweep second hand would have stopped at the exact average miles per hour traveled over the timed mile…providing an exact direct reading in mph from the calibrated scale. 

The “Semi” is loaded with extra features: The "Sapphire" crystal is very durable resisting chipping and scratches. The screw down view back and all surfaces are sealed to provide 150 feet deep-water resistance.  Notice the porcelainized dial and numerals; large and easy to read.  The entire package is nested in an all Stainless Steel case  ( 36 X 9 mm ).  Each “Semi” bears a serial number on the dial at the three o’clock position. 

Read editorial in International Wristwatch Magazine.