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1306-C
Ret-ro rules in-line, adaptation of 1220-design, using two construction methods (“hybrid-build” technique); all-wire frame with “damper” main rails, separate center-guide section attached to motor box with torsional inner section (wire version of “H” cut) made of 0.010” brass sheet backed with 0.039” wire, and torsional 0.010” brass sheet backed with 0.039” wire inner side pans and wire outer side “pans”.