Mint Orion II (566), new in April 2006. Serial number 02C10116. Includes Ten Tec 600 Hz and Inrad 250 Hz roofing filters. $2,800 includes UPS insured ground shipping, lower 48. You are welcome to make any offer. Home phone 973.383.5908, tjbattles at embarqmail.com. Thank you. Tom Battles KJ2M