This is at an Arizona GC, with very little info about the instrument's history, even on request. I did get these additional pics, though. Thoughts?
http://s1341.photobucket.com/user/dby3/media/IMG_3139_zpsrotrauai.jpg.html?filters[user]=143681835&filters[recent]=1&sort=1&o=1
http://s1341.photobucket.com/user/dby3/media/IMG_3140-2_zpsjntovqzz.jpg.html?filters[user]=143681835&filters[recent]=1&sort=1&o=4
http://s1341.photobucket.com/user/dby3/media/IMG_3141-3_zpsl4oeqybe.jpg.html?filters[user]=143681835&filters[recent]=1&sort=1&o=0
http://s1341.photobucket.com/user/dby3/media/IMG_3139_zpsrotrauai.jpg.html?filters[user]=143681835&filters[recent]=1&sort=1&o=1
http://s1341.photobucket.com/user/dby3/media/IMG_3140-2_zpsjntovqzz.jpg.html?filters[user]=143681835&filters[recent]=1&sort=1&o=4
http://s1341.photobucket.com/user/dby3/media/IMG_3141-3_zpsl4oeqybe.jpg.html?filters[user]=143681835&filters[recent]=1&sort=1&o=0