You are looking at a rare lot of 7 Sony Japan Service manuals for some quite collectable and sought after vintage electronics. You have the HST-49 Cassette Receiver. ICF-C575W and ICF-C411W FM/AM/Weather Digital Clock Radio. TFM-6150W and TFM-6060W FM/AM 2 Band Radio. ST-A7/A7B FM Stereo Tuner. ST-A6B FM Stereo Tuner. And the real gem, the TA-E7/E7B Stereo Preamplifier. These manuals are in good condition with diagrams/schematics, specs, and all the information a technician would need. Lot weighs 11 oz before shipping box and packing material. About 2 lbs shipped secure.