Help with winding a New Master 100 day clock.

[gearbasher]

Hi, I have some experience servicing pocket watches, so a friend asked me to look at his New Master 100 day clock. He said got it from his brother in the 60s/70s and it never ran. It was fully wound when he gave it to me. I released the main spring, oiled it and set the beat. I was only able to wind it about one full turn. It's running and keeping decent time. My question is: How do you wind one of these fully? There is only a knurled post to wind it. Even wrapping it with rubber, I was only able to get, maybe, one full turn. Is there a tool? Is there a problem with the winding mechanism? Any info will be appreciated. Thanks.

 

[KurtinSA]

Here's a thread on Master 100-day clocks. Does this look like your clock?

https://mb.nawcc.org/showthread.php?128391-Nisshindo-New-Master-standard

And another:

https://mb.nawcc.org/showthread.php?36747-100-Day-New-Master-from-Nisshin-Clock-Tokyo

These pictures show a knob to go on the winding arbor...sounds like you're missing that. As noted in the above thread, these mainsprings come in a sealed barrel and there is little need to take them apart for service.

However, John Hubby says in this thread that the 100-day clocks are different regarding the barrel and that maybe the spring can be serviced:

https://mb.nawcc.org/showthread.php?110517-Help-needed-with-New-Master-100-days-clock

Kurt

 

[gearbasher]

Yeah, I saw those threads and have been looking at pictures all over the web. I saw one clock with a knob that has a set screw on the shaft, I'm wondering if that's what's missing and needed. Thanks.