HR No. 2916 Mainspring for Phinney Walker Clock

HR No. 2916 Mainspring for Phinney Walker Travel Clocks the 1940's and beyond. I know the envelope doesn't indicate it but HR uses the same number scheme that another company did for clock mainsprings and they show this fits the aforementioned Phinney Walker, and could also very well fit in other travel & Alarm clocks as well. 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.