Fleissner 713

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Wolf-Fleissner “Singing” Safety Lamp No. 713

The Wolf-Fleissner No. 713 is considered one of the most desirable safety lamps among collectors because of its unusual design and rarity.  The 713 looks very different from the 712, but the internal sounding system is basically the same.  As indicated on the advertisement below, the 713 was designed for taking methane readings from overhead in confined spaces.  The lamp was built heavy duty, and is totally enclosed to protect from dripping water.  The prism, used to view from above the lamp, is typical of other Wolf lamps made for the same purpose,

“First check from above with the acoustic-optical test lamp”, Says this Friemann & Wolf 1933 advertisement.

Click images below to view other Wolf-Fleissner “Singing” Safety Lamps: