From the Panasonic virtual bike museum...
1977 Panasonic Sport Deluxe Factory Specifications with added details when obvious. Approximately 58 cm seat tube as pictured above.
List Price: Unknown [Price paid for new bike in 1978, $170]
Frame: High Tensile 1020 Butted Tubing and chrome fork crown
Fork: High Tensile 1020 with chrome tips.
Stem: SR Alloy
Handlebar: Sakae Randnner Road Champion [Randonneur style]
Saddle: Panasonic Black Vinyl Leatherette
Crankset: 40/52T forged alloy cotterless [Tourney w/170 cranks]
Freewheel: Freewheel 14-28
Chain: 1/2 x 3/32 x 114 links
Hubs: Shimano 8A; 36 spoke high flange; quick release.
Rear Derailleur: Shimano 600
Front Derailleur: Shimano 500 Uniglide
Shifting Lever: Unishift Stem-mounted
Brakes: Diacompe Alloy, center pull w/ hooded levers, safety levers, and quick release levers.
Rims: Araya 27x 1 1/4 – 1 3/8 steel;
Tires: originally with 27 x 1 1/4 Panasonic tires; currently Continental Sport 1000 27 x 1 1/4?
Spokes: 14 G UCP finished w/ reflectors
Pedals: KKT RT – SF w/reflectors
Color: Red
Weight: 31 pounds