Sony already had the 'wrap' (beta) around head drum perfected when they introduced the (much bigger) umatic 3/4" (tape width) videocasette in the very early seventies.... very solid stuff and translated well to the smaller beta format.

GQ

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93 Disco 1 V8 for sale - maybe not...
78 S3 GS FFR gone
95 Disco 1 V8 Rossignol gone