Here are 2 photos of all 6 early Astros!
1) Top 3 are Astros made for NASA between 1960-62. All 3 in the earliest brown Micarta, which I believe was linen. The 2nd generation brown Micarta (Bottom 3 Astros) was canvas. The 2 generations of Micarta have a distinctive look. I'll try to post a close-up of both.
Joe Dorsky has an excellent article on brown Micarta on his website.
http://www.rmkcollector.com/the-rand.../brown-micarta
2) Middle 2 Scaleless Astros as advertised in the 16th printing of the Randall catalog of 1963, less the thong holes.
3) Bottom 3 brown Micarta Astros made probably between 1963-1965. The bottom one is etched 1965.