Thanks Paul. All but one of those I have seen - the one I had not is C63.353 which has a circuit for the Tele 215. This answers the question I posed earlier but introduces a couple more.
1. What is the telephone code for the D8 with the hook latch and its subset?
2. Why is a hook latch added to a D8 and the mounting is still coded D8?
Perhaps because I look for the latch but before now, all the D8s I had come across had hook latches.
Jack
I haven't studied this in detail, but recall a discussion about Vern's set.
http://www.classicrotaryphones.com/forum/index.php?topic=23479.0It's possible that the part stamped D8-A9532 was treated as an option that could be added in the distribution houses as needed (using a standard "kit of parts"). If so, finding it in a catalog or BSP would be a challenge, as they were generally not marketed -- but only supplied when absolutely "needed."
That strategy was used fairly often for features that were ordered fairly infrequently but often enough that a standard modification was helpful. That saved the cost of creating and inventorying a separate mounting code or model number.
Some of my favorite (later) standard sets that included standard modifications were documented in the April 2018
Singing Wires -- a WE 565 keyset and a 558 wall set that were both modified to include speech amplification, as was done in a 532 set. They expected to place enough amplified desk sets to justify creating a separate model number, but the demand for amplified wall and keysets was much lower. There's a small photo of the modified 558 here:
http://www.paul-f.com/we500typ.htm#558With a little thought we can probably come up with many other examples. There are several BSPs that list standard modifications implemented with kits of parts and I have several sets in my "study someday" box that have modification codes stamped on the bottom.
