One ear with earhook, with 4 foot cord, 3.5MM mono plug. Two pieces are shown here, but these are designed for single ear use. Made in China P/N SG-20S
Two ear, metal band, with 4 foot cord, and 2.5MM mono plug. Made in Taiwan.
P/N HD-M1
18mm long 16mm diameter Sensitivity: -65±3dB Impedance 1KΩ Freq. Range 20-20KHz Operating Voltage 1.5V - 12VDC Current 0.5mA max. Signal/Noise Ratio 40dB min Made in Taiwan P/N CRM-935
11mm long 10mm diameter 5" leads Sensitivity: -62±3dB Impedance 1KΩ Freq. Range 20-20 KHz Operating Voltage 1.5V - 12VDC Current 0.5mA max. Signal/Noise Ratio 40dB min Made in Japan P/N ECV-11
31.2mm diameter 21mm high Sensitivity: -70±3dB Impedance 500Ω Freq. Range 150-6 KHz Made in Japan P/N DU-7
All metal, assembly-type (handle unscrews to solder cable) nickel-plated shell and strain relief spring, black trim ring. High quality. Made in Taiwan P/N EW-2534
For 14MM diameter lapel microphone. All plastic. Black. Made in Taiwan P/N CP-7
For 14MM diameter lapel microphone. Plastic mic holder, metal tie-clip. Black. Made in Taiwan P/N CP-11
High quality stereo cassette tape record/playback head for metal or standard tapes. Terminates to four pins. Made by Ikejiri (Japan). Model RS-1251.
High quality 8 track cartridge mechanism for home stereo or car stereo. This model includes 2 channel tape head and transport motor. Terminates to bare wires. New old stock (NOS). Made in Japan. P/N TN-777