Called another Retiree this morning. His read was as follows. Sequencing # was used but was dependent on who was working the station. His recollection was under the upper valance for the number.
His take on what he is seeing here:
RG= Rally Group
GM= General Match
427M = Match to 427 doghouse assembly.
Likely also 350/396M and RG used there as applicable as well.
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