Color VTRs and color upgrades
                    
                    
                    
                    Self-threading machines
                   
                  
                  
                  Timelapse VTRs
                    
                  Long before VHS timelapse recorders, a few
                  companies offered timelapse open reel video recorders.
                  These worked by
                  
                  
                  
 
                  
                  Sanyo VTR-1350 could record 48 hours of timelapse
                  footage to a one hour tape and cost $2350 in 1975. 
Popular
                      Science, March 1975