Help identifying obscure movement

[Alex Hamilton]

Hello fellow pocket watch enthusiasts,
About a year ago I was given this pocket watch by my sister. Apparently it belonged to my great grandfather. I have searched through all my resources and have come up with nothing in the way of figuring out what this movement is. There are no markings on the dial or the case.
Here's what i know about my GGF.
He was born in Ireland and came to the US as a immigrant at the age of 16., He lived from 1835 to 1909.
There are 5 jewels, (balance, pallet fork and impulse).
These are the best pictures I could take with a couple things that stood out to me.
1) The shape of the A in Herald
2) The shape of the balance staff looks different from what I've seen
3) The oval Impulse Jewel
4) The arm of the pallet in riveted on
5) the pallet jewels are completely flush with the slot.

I know this is a long shot, but any information would be helpful and much appreciated.
Thanks in advance, Alex

 

[roughbarked]

Herald was a brand name that Longines watch Co once used. Though I wouldn't quote me on that since it had a different trade mark than seen on this watch.
Otherwise it reminds me of an older version of the AM/Felsa 125. Older by the English style pallets.

I'm sure experts will be along shortly to prove me in error on all counts.

 

[Alex Hamilton]

Herald was a brand name that Longines watch Co once used. Though I wouldn't quote me on that since it had a different trade mark than seen on this watch.
Otherwise it reminds me of an older version of the AM/Felsa 125. Older by the English style pallets.

I'm sure experts will be along shortly to prove me in error on all counts.

Thanks for your impute,
Any idea why they would have put flush stone in the pallet ? When I first saw it I thought they were broken or worn down but under magnification it looks like the lock is right. Maybe to reduce friction on the impulse face ? Still a mystery.

 

[roughbarked]

https://mb.nawcc.org/threads/english-levers-with-unjewelled-pallets.165972/post-1336522

 

[gmorse]

Hi Alex,

As you'll have read in the thread referenced by roughbarked, mounting the pallet stones in this way was the standard method in English levers. The escape teeth don't contact the pallet frame, just the jewels, at least if the escapement hasn't been fiddled with, and there's no difference in respect of friction between this type and the later, more visible way of mounting them. In fact, the impulse planes on most English pallet stones are radiused to reduce the contact area.

Regards,

Graham