[Collins] KWS-1 Meter Needed and Questions Answered

[The Shultz's]

My KWS-1, SN 1339 has two different style of meters. The one on the left,
which is the multimeter is a Bartlett style model 521 case and the one on
the right, the plate curent meter is a Simpson 800 ma style case.

I would like to make both the same and have a couple of questions. Did
Collins change from one vendor to another at some point? Was there a
particular SN where there were different vendor supplied meters such as
mine. What is normal for my SN?

I prefer the Bartlett 521 style to match my 75A-4 so I'm hoping to find an
800 ma lighted Bartlett 521 style meter to purchase or trade for the Simpson
800 ma meter I currently have installed. I have looked at replacing the
insides since I have spare meters of both vendors but the case differences
require more machining to fit than I can presently handle.

TNX, Roger NJ2R