Stock. I don't have a 69 but I do have a 5906, which is just a full size version.Sure does look like those 3 stainless mags, minus the finish off course. Are those your mags or is that a stock photo?
There may be blued ones but they are all single stack. I just don't remember if it's 8 or 9 roundsI went on gun broker, and typed in S&W 4013, the 4013 TSW came up and mags, to me looked like the blued double stack only stainless.