HR ALARM Mainspring No. 789 for Emes 20, 22, 23, 37 Travel Clocks

HR Mainspring No. 789 for Emes Model 20, 22, 23, 37 Alarm and Travel Clocks the 1930's and beyond. This is the ALARM side mainspring in steel. Could also very well fit in other travel & alarm clocks. Note while the mainspring is new the envelope has been handled quite a bit over the years. See image for precise mainspring characteristics. I specialise in parts for all forms of vintage watches and clocks and all are sold with an unconditional guarantee.  Images to a suitable job of representing the item.