Ball-Illinois 60-hour?

KipW

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First, is an Illinois model 11 fitted with a 60-hour mainspring? Second, since a Ball-Illinois model 810 is essentially an 11...does it follow it would be a 60-hour watch also? The Ball-Illinois is not marked as such, so its a bit of a mystery (to me anyway). BTW, is there a way to identify 60-hour watches other than the obvious marking? Thanks in advance for any info on this!
 

terry hall

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Model 11 is a 48 hr mainspring, as is the Ball-Illinois.... not sure if the ball is classed as a model 11, it had its own grade.... hold on,
in 'meggers' he does classify it as a model 11, unsure if any mechanical differences for ball.

identify.. marking, serial number sequence
 

179

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As there are unmarked 60 hr., the easy way for me is, the 60 hr. Winds much more softly and much longer than 48 hr.
 

Christopher Burris

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I found my average on a 48hr Illinois size 16 is 6 - 6.5 rotations of the winding wheel, while it was about 8.5 on my Ball/Illinois.
 

terry hall

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As there are unmarked 60 hr., the easy way for me is, the 60 hr. Winds much more softly and much longer than 48 hr.
Unmarked Sangamo Special.... ?
I believe all Bunn Special are marked in some manner.
 

John Cote

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I don't have my Meggers book handy and I am confused. Do we believe that any of the 16s Illinois Ball ORRS watches were fitted with 60 hour barrels and mainsprings:???:??
 
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John Cote

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I have heard rumors of a prototype but the source was not good. I do not believe that any of the production Ball Illinois watches were ever 60 hour.
 

KipW

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179 - check ebay. There's a seller there claiming 60-hours on a wind, for the Ball-Illinois 810 (model 11) he's flogging for $3400-plus!
 

terry hall

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ptttttttttttttth.............

don't you think if it WAS a feature that Ball would no have promoted the hell out of it:???:

if you fit up the correct spring in a 992b it will 'run' for 60hrs.
 
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179

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Ball was not at all shy of promoting things, at times one could say he went overboard.
 
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John Cote

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ptttttttttttttth.............

if you fit up the correct spring in a 992b it will 'run' for 60hrs.
There might be a couple of ways to get a nice watch like this to run 60 hours or almost...but again...as most of us know...none of these would be with the mechanics of a true 60 hour Illinois power train. So, I like the "ptttttttttttttth" part of your message the best.
 

Greg Frauenhoff

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If a different barrel is required for a 60 hr watch then check it (and the barrel cover) for a lightly scratched partial serial number. It should match the rest of the mvt.
 

179

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A 60 hr. Mainspring is 3.0 mm wide and will not fit in a barrel meant for a 2.70 spring. I do not look at much on ebay, and believe even less. I find a lot of omissions and outright lies.
 
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John Cote

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A 60 hr. Mainspring is 3.0 mm wide and will not fit in a barrel meant for a 2.70 spring. I do not look at much on ebay, and believe even less. I find a lot of omissions and outright lies.
And, Isn't it also true that the deeper barrel for the 60 hour mainspring will not fit between the plates meant for the less deep barrel? I know people have made it work but I think they have had to do some machining?
 

179

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Correct John, with enough time and MONEY almost anything can be done. As a side note after Hamilton purchased Illinois, they experimented with putting 60 hr. Mainsprings in 992 models. Production was never adopted.
 
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John Cote

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Correct John, with enough time and MONEY almost anything can be done. As a side note after Hamilton purchased Illinois, they experimented with putting 60 hr. Mainsprings in 992 models. Production was never adopted.
I have seen at least two of these 992 proto/weirdneses.
 
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