The syncronization is set as follows:
|Time (ms)||Dot Color||Description|
|0||red||X (electronic flash)|
|5||white||F (gas filled flash bulbs)|
|20||blue||M (wire-filled flash bulbs)|
|23||yellow||S (large slow flash bulbs)|
Shutter cocking and release are done with two separate levers. Focus viewing is accomplished with the press-style focus lever.
The rim is metal, and the front is black with white markings: two concentric rings, the ``ILEX'' company logo, and ``Ilex No 3 Synchro Shutter'' in a sans-serif art deco font.