Daniel, I think you have an interesting gun. First, the serial number of this gun is in a range where factory records were not recovered, so any info you can furnish along with photos have historical value for the association. As Dr. Jim's research indicates, gun # 89,999 was built in 1901 so your gun was built sometime later. We don't know exactly when and in what configuration it was built. Also, being built after 1901, the barrel stop or roller check joint would probably be of the second style so you may need a set of barrels configured for the second style. Please post photos so that others here can give you more assistance. If you can't post photos please send them to Jent Mitchell @ jent.mitchell@gmail.com so that he can post them. Thanks, Tom