Western Electric dial ID

[Sargeguy]

In an effort to weed out some white elephants from the collection, I have the following dials but am not sure what they were used for:

6U41 dated 12-73
6DA with brass colored fingerwheel
6JA with clear fingerwheel

The latter 2 dials are mostly plastic

[Sargeguy]

Special Bonus Question:  What was an 11C used for?  It is small, has a clear fingerwheel, and the fingerstop moves when you dial.  Butt-set???

[Adam]

Yes.  My butt set has an 11A dial, so that's probably just a later version.

At first glance you'd think it's the same dial as in a rotary Trimline phone, but on closer inspection the dials are very different.  The 11 dial has a much more compact mounting than the 10A dial in a Trimline, and the 11 dial has a solid dial number plate, not transparent like the Trimline dial.