I was getting ready to take down another "purdy" Model 5 Illinois HC watch and thought I had a busted Regulator whip, but closer inspection shows this is a complete regulator. The Micro adjust screw is riding in a slip nut under the regulator arm. Anybody seen one of these? What is it?
Posts: 6492 | Location: Southern California in the USA | Registered: July 19, 2007
I found these same regulators pictured ONLY on early 18s Bunn models in Ehrhardt's Illinois "Bible". Evidently they were transitional between the Teske and the later Gooseneck designs, certainly more expensive to make than the Goosenecks.
Posts: 6492 | Location: Southern California in the USA | Registered: July 19, 2007
Actually David, I'm not sure it is related as much to the era in which the watch was made as to the design. My understanding is that smaller, more compact regulator such as we find on your watch was used only on the Illinois Hunter-Case movements.
A close examination will reveal a clearance problem that would come into play if the Open-Face regulator were used on the Hunter-Case movements. The balance bridge is positioned so close to the edge they had to design a special regulator.
There is additional clearance on their Open-Face movements...
Posts: 10553 | Location: Northeastern Ohio in the USA | Registered: November 19, 2002
That checks as mine is the model 5 with the cock angled almost radially, and the one you pictured is the model 6 which was TOTALLY redesigned for a more tangential cock angle allowing more space for the longer balance cock arm needed to use a gooseneck design. The nice thing is that Meggers reports the pre-1900 grade 64's (as mine is) are RR Grade mvts., although as a hunter case, I doubt it was used for RR.
Posts: 6492 | Location: Southern California in the USA | Registered: July 19, 2007
I just bought Illinois M5 S/N 1614974 mounted as a sidewinder in a very nice nickle swing case. It has the same unusual micro-regulator you are discussing here.
I was looking for a candidate to fit my NOS Illinois RR conversion dial.
My movement is a 15J movement, not marked adjusted. But the "Pocket watch database" says it is an adjusted RR movement.
Can you validate or crush this data point?
Thanks, Pault
Posts: 2032 | Location: San Diego, California in the USA | Registered: August 30, 2012
The Illinois Vol. #2 on pg 99 under Grade 51 [which yours is and from 1902],paragraph 4 says that watches finished before about 1900 and marked "adjusted" would have qualified as RR Grade.
regards, bb
Posts: 6376 | Location: Texas in the USA | Registered: July 27, 2009
I just sold an Illinois Grade 65-E hunter made for the Non Magnetic Watch Co, this was RR Grade with the same type of micro regulator. It was a extremely nice watch with gold inlaid writing and damaskeening, this was made around 1897 and came in 17 nd 19 jewel variants and supposedly only 290 made in these variants.
Posts: 2265 | Location: Gladstone in Australia | Registered: January 14, 2011