never seen such TS.
the stamped brakebridge was "the" part that made Hutch frames diffrent then others.
I know those brakebridges could bend a little after hard braking.
Maybe someone replaced it with a tube?
Love to see some pics.
I found one the same way. Round brake bridge, long frame standers under the seat (just the US models) and a baseball stamp. Must be a early Japanese model?