Check the listing for details. Arrow Solid state 623 (same as: Sony TR4100) (1972-75). Condition: Used. Listed at 17.00 USD. Arrow Solid state 623 (same as: Sony TR4100) (1972-75) I did not open this radio up to test it out (thus buying as-is) The following was copied from the Radiomuseum https://www.radiomuseum.org/r/unknown_arrow_solid_state_623.html https://www.radiomuseum.org/r/sony_tr_4100tr410.html ountryUnited States of America (USA) Manufacturer / BrandArrow (Arrow Trading Co).; New York, NY Year1975 ?? CategoryBroadcast Receiver - or past WW2 Tuner Radiomuseum.org ID232760 Picture Schematics Arrow Arrow Trading Solid State 623 (2) By Courtesy of Ebay Seller ncautoman57 Technical Specifications Number of TransistorsSemiconductors present. Semiconductors Main principleSuperheterodyne (common) Wave bandsBroadcast only (MW). Power type and voltageDry Batteries / 1 x 9 Volt LoudspeakerPermanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) MaterialPlastics (no bakelite or catalin) from Radiomuseum.orgModel: Solid State 623 - Arrow Arrow Trading Co.; New ShapeVery small Portable or Pocket-Set (Handheld) < 8 inch. Notes AM Pocket Radio Model Arrow Solid State 623. See also Sony TR-4100. Made in Hong Kong ****************** R-4100 Sony Corporation; Tokyo CountryJapan Manufacturer / BrandSony Corporation; Tokyo Year1972 ? CategoryBroadcast Receiver - or past WW2 Tuner Radiomuseum.org ID107880 Picture Schematics Sony Corporation; TR-4100 (2) Technical Specifications Number of Transistors6 Semiconductors Main principleSuperheterodyne (common); ZF/IF 455 kHz Wave bandsBroadcast only (MW). Power type and voltageDry Batteries / 1 x 9 Volt LoudspeakerPermanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6.5 cm = 2.6 inch MaterialPlastics (no bakelite or catalin) from Radiomuseum.orgModel: TR-4100 - Sony Corporation; Tokyo ShapeVery small Portable or Pocket-Set (Handheld) < 8 inch. Dimensions (WHD)2.6 x 4.4 x 1.3 inch / 66 x 112 x 33 mm Notes Sony TR-4100 Solid State, aluminum front, on/off-volume wheel; Foster speaker (8 ohm, 0.2 W); earphone jack, carrying strap. It inspired several models such as Seiko FS-23, Seiko FS-71, Seiko Four Star, Seiko Stewart ST-20, Stewart vertical, Arrow 623, Windsor M9M, Windsor Solid State, Computron 623, Electro-Brand horizontal, Electro-Brand vertical, Federal, Caprice, Soundwave, AI Rhapsody, Nobility. Made in Hong Kong Net weight (2.2 lb = 1 kg)0.190 kg / 0 lb 6.7 oz (0.419 lb) Mentioned inCollector's Guide To TrR1 Bunis trans.94 (1996, page 260) AuthorModel page created by Peter Hoddow. See "Data change" for further contributors. Please ask any questions before the end of the auction. I want you to be fully satisfied with your purchase FOR SOME REASON, IF IT DOES NOT SELL, PLEASE WRITE AND MAKE OFFER