Ted, it was sleeved. I believe they had a $12,000 price on it! Nice island action gun though.
Here's the description that was in the auction:
"J. Purdey & Sons, Island side lock, Hammer gun. This is circa 1883, Purdey 12 bore with 29 sleeved steel barrels and 2 chambers. The barrels retain the original concave top rib. The bores are both .722 and are choked: Right .012 / Improved Cylinder & Left .022 / Modified. The gun features double triggers and extractors. The stock is vintage Purdey and a classic straight grip with a burgundy leather covered recoil pad by Michaels close friend and fellow author, the great gunsmith, David Trevallion. The stock dimensions I assume were bent to Michaels specifications of: DC: 1 9/16 x DF: 1 + @ 5 x DH: 2 1/16 x Cast Off at Face: x Cast Off at Heel: 3/8 x Length of Pull: 15 1/16 w/ 1 down pitch. The gun weighs in at a perfect 6 lbs. 12 oz and balances ala McIntosh at 7/8 in front of the hinge pin. The serial number is: 12417. Michael McIntosh and hammer guns were made for one another and I am confident Michael loved every second he worked on his project Purdey hammer gun with David Trevallion."