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1220-C
Ret-ro rules in-line version of 1220-A chassis; all-wire frame with “damper” main rails, separate center-guide section attached to motor box with torsional inner section (wire version of “H” cut), and inner and outer torsional wire side “pans”; incorporates three 0.010” brass sheet backed with 0.039” wire pans, one at the rear of the “H”-center-guide section, and two at the rear of the inner wire side pans.