There was something different between a 625A and a 625B.Part of my collection:
Also, the 625 had a silencer with an on / off toggle switch on the left side of the meter, whereas the 525 did not have the silencer. I remember because the 525 and 625B were in the showcase and I bought the 625B because of the silencer. Did it make any difference? Who the h*** knows! Lol..lol! Those darn radio salespersons! Lol....lol!