Cross Townsend Medalist M nib and Waterman's Harmonious Green. I think this is one of the early models as has a Cross Ireland on the top part of the cap on two different lines. Nice heavy pen with a Cross converter.
I found this delike alpha in a bag that I had some old pens in. It was still in the box and never used! I have a delike alpha that I keep inked up on a pretty regular basis, but it was nice to remind myself that I have a spare! So I threw some noodler's Lexington gray in it and grabbed a field notes and threw them in my pocket. Love this thing!