Graetz Polka 1113 E Radio/Tuner - $75 (Interlochen)

This Graetz Polka is in good condition and plays well but will stop working after 10-15 minutes and will restart with a tap on the cabinet.
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loose wire or connection inside? Manufactured in Germany around 1962.
It has AM 525-1600, FM 88-108, SW1 49-125m and SW2 13-41m.
There are two speakers for great sound plus Bass and Treble tone controls.
There is also Tape/Phono/CD input and a antenna on/off button.
Cabinet is in good condition with its original finish (there are some scratches and cracks in the gloss varnish finish).
Dimensions are 20.
5"W x 12.
5"H x 9"D