Yes Jeff, the small rotating wheel on the front adjusts the F/S regulator on the all mechanical movement. There are no adjustments on the back. And it's an 8 day mainspring.  I plan to leave this to KPH at Point Reyes when I "check out"
as they have other Mackay Radio items there. 


On Sun, Jan 9, 2022 at 10:14 AM, Jeff Logullo
<jeff@logullo.com> wrote:
Here’s a nice explanation of the items (silence periods) on the clock’s face:

https://g0kya.blogspot.com/2010/09/history-of-ships-radio-room-clocks.html

It looks like there’s an indicator on your clock’s face (between 2 and 3) showing the position of a Fast/Slow adjustment (presumably on the back). True?

Ah - now I see the spot for the winding key on the front (above 6). So maybe the F/S is adjusted from the front...?

That’s a handsome clock - take good care of it :-)

Jeff N0̸MII 


On Jan 9, 2022, at 10:05 AM, abqcooks--- via CW <cw@mailman.qth.net> wrote:

Here's a photo of a wall clock I have in the shack. Supposedly it dates to WW2 and was on a Navy ship.  Since there's been chatter about coastal stations and such I thought I would post this photo. Note it's marked Mackay Radio. Any old timers seen a clock like this ??