In very nice working condition. Not sure about the calibration. Has one modification - XLR in and out added for convenience. (NOTE- I installed these XLRs years ago for convenience). Nice unit and I have an identical pair.The item "Spectrasonics 610 Comp-Limiter VINTAGE" is in sale since Thursday, August 25, 2016. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips".
The seller is "russhulme" and is located in Duncan, Oklahoma. This item can be shipped to United States.