5 is the plant code (in this case, Owensboro, Kentucky). If one has a general idea of the age of the piece in question, usually the decade can be divined from that.Īnother alternate is in the format following:ġ88 is General Electric. Usually single digit date codes are from the 1940's, but have on occasion shown up in later decades, even up to the 1970's. Where 137 is the manufacturer code (in this case CTS), 59 is the year (1959), and 04 is the week.Ģ74 is the EIA code (RCA) 9 is the last digit of the year (in this case 1949). They generally follow the following format: (example) Note that many makers also stamped OEM (Original Eqipment Manufacturer) part numbers above or below the EIA code, in some cases parts makers or the customer elected not to include the EIA codes, so not all parts have them. All used speakers listed below are in fine working condition:We doublecheck before shipping. Eminence is home to the loudspeaker manufacturing company, Eminence Speaker. These are codes often seen stamped on components found in US made vintage tube equipment.Ĭode formats were not completely standardized, but a little deciphering will generally yield the info of interest. Detailed information on Zip Codes in Eminence, Kentucky.
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