I have to ask, why mono only? And why are you collecting vinyl for your wife when she has only CDs and you have only a turntable?
Start here for an excellent summary of his work.
The first stereo records were in 1958. I believe Porgy and Bess was the first Miles available in stereo. It was released in mono CL1274 and stereo CS8085, They continued releasing both for some time and I'm not sure when they started stereo only, but I believe late 60's.
There are also several complete discographies of his work on the internet if you google it.
Start here for an excellent summary of his work.
The first stereo records were in 1958. I believe Porgy and Bess was the first Miles available in stereo. It was released in mono CL1274 and stereo CS8085, They continued releasing both for some time and I'm not sure when they started stereo only, but I believe late 60's.
There are also several complete discographies of his work on the internet if you google it.