Disassembled the front forks planing on replacing the fork seals. Was shocked when I noticed the fork tubes had springs on the exterior of the tubes. Everything I had seen online showed forks with springs on the inside of the tubes. So I did some more research and found out that the 68 - 71 year models have springs on the outside. Still not sure why my 1972 cb350 has 1971 style forks. Was the bike built in 71 and titled in 72? Also noticed some rust on the fork tubes but I don't think I have anything to worry about since it looks like its above where the oil seal will slide. Here are some picture of the forks, the rust ad some before and after pictures of the fork bottoms after cleaning them up. I sanded with 500, 1000, 1500, 2000 and then buffed using some red rouge.