Masterpiece / Super XII overlap? transitional?

My Masterpiece has a dual 10Uf / 350v can, one cap in the G2/Cathode bias circuit of the first audio 6K7 and the other cap in what appears to be 3rd grid/plate circuits of all tubes. This configuration does not appear in the masterpiece schematic but does appear on the super XII schematic. Which came first the chicken or the egg? Haha
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    Randy Rago

    Me to, George. All caps done. Working through resistors now
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    George

    Tale to share. Some years ago I would work on tube radios over the winter. One of the more involved sets was a Hallicrafters SX28A which I did for someone.

    The radio has never seen a malicious soldering iron in it’s life but due to the radio’s perpetual deafness someone in the recent past added a solid state RF preamp encapsulated in rubber heat shrink.

    The radio carried two assembly line defects, simply put two wrong resistor values in a couple of places one of which would kill receiver sensitivity. These were all factory original parts BTW. So when the radio failed QC testing back in the 40s it was simply set aside then later when the war ended it was sold as defective war surplus.

    The overhaul effort discovered the two factory mistakes and once repaired the radio sprang into life.
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    David C. Poland

    Randy - A Scott Masterpiece is identified (compared to a Super 12):

    - total of 14 tubes on the 2 chassis: 11 including the eye tube on the receiver and 3 on the power supply..

    -absence of out put 6V6's on the receiver chassis - they were moved to a 3 tube power supply using a 5U4      rectifier.

    - Stradavarius black dial had a added 5 th Ultra High SW band (for Television audio).

    - Phono switch moved from the band switch to the lower left SELECTIVITY control switch.

    - single Scott badged 12 inch flange mount speaker with octal plug on speaker cable, with two field coils.

         (Same speaker used for the earlier Scott model 16 and the 19 tube Phantom.)

    - the presence of 6 control shafts is not conclusive, because the late production Super 12 model also had 6 control shafts but some with different purposes - and had a small single rectifier for a 1 tube power supply.

    -FYI - one FM/AM Masterpiece has shown up and it had 2 eye tubes but unlikely what you have.