Sony Betamax Model SL-5600 Home Forums Galleries Beta Format Galleries Sony Betamax Gallery Vintage Video Galleries E-mail   Vintage Sony Betamax VTR Model SL-5600   Sony Betamax SL-5600 Information     Sony Betamax VCR model SL-5600. From 1980. Sold for $1350. Improved SL-5400, introducing 14-day 4-event programming, electronic indexing (called "Tab Marker System"), and 10-minute battery back-up.   Pictures