• The Bulletins and Marts are again available online. The network connectivity problem has been fixed. Thank you all very much for your patience.

Bunn Special 16S / 23 Jewels and Gold-?-Settings on the Mainspring

Marty101

NAWCC Member
Oct 28, 2007
775
179
43
66
Niagara Falls,N.Y.
Country
A friend asked me to examine a 16s/23J Bunn Special pic of the movement, and see what I thought of the jewel setting on the mainspring. It appeared to be brass, or at least a different color gold from the other settings. He could find little data about this setting, and considering it was a BS/16s/23J that seemed odd to me. What he did find was that a change occurred in 1930 or so-but what that change was is a mystery.

I have not collected Illinois, and I'm not familiar with the many variations I have heard about over the years. But a jewel setting gone rogue is suspicious. My first instinct is to "stare and compare" so I went to ebay and found plenty to stare at. I found matching gold settings, settings not matching, and what appeared to be nickel or missing settings-?-

Now, I know how that sounds. I admit some pics were not great, but I saw more than one. So here I am, friends-asking for help once again.
 

Fred Hansen

NAWCC Member
Aug 18, 2002
5,471
685
113
Country
There are three different types of barrel jeweling among 16 size Bunn Specials which Michael Chamelin’s book does a great job of explaining.

The earliest examples, serial numbers 2572601 to 2981000, have an internally jeweled barrel with no barrel jewel visible externally.

The run beginning at 3291401 introduced the Motor Barrel with an externally visible jewel to Bunn Special production. The earlier examples of these have this jewel in a gold setting and production of these includes watches with serial numbers between 3291401 and 3815200.

At serial 3815201 the gold setting is eliminated, and watches now have a friction set jewel as seen in Rodney’s example above.

So you have ...
  • No jewel visible (up to s#2981000)
  • Jewel in gold setting (s#3291401 to s#3815200)
  • Jewel with no gold setting (s#3815201 and up)
But a watch you describe with a brass setting would be someone’s later modification to one of these styles.
 

musicguy

Moderator
Staff member
NAWCC Member
Sponsor
Jan 12, 2017
8,365
4,851
113
New York State
Country
I looked at my 19J (that has GJS) and as many as I could look at
online and I was confused as well.
Thanks for the detailed information Fred!


Rob
 

Marty101

NAWCC Member
Oct 28, 2007
775
179
43
66
Niagara Falls,N.Y.
Country
Thank you Fred-very much for that.

My friend has Chamelin's book; I'm about to embarrass him into a second look. :)
 
  • Like
Reactions: musicguy

Forum statistics

Threads
169,752
Messages
1,481,655
Members
49,143
Latest member
Great Leslie
Encyclopedia Pages
1,060
Total wiki contributions
2,965
Last update
-