The rare vintage grayface 610. AMAZING pre but you already know that if you are looking! Fully working and very good shape for it's age.The item "Universal Audio M610 Mic Pre and DI Vintage Gray Face" is in sale since Tuesday, November 20, 2018. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips". The seller is "40hz-20khz" and is located in Miami, Florida. This item can be shipped worldwide.