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You should check the length of your barrel again. Measure it from the end of the barrel at the muzzle to the face of the cylinder, which is the correct way to measure a revolver. It should be 6", not 5".
The 29-3 Classic Hunter came out in 1987. There was a contest in Shooting Times magazine to give it a name, and Classic Hunter won out. It came from the factory with a non fluted cylinder, adjustable four position silhouette front sight, and Hogue rubber monogrips.
They were produced in 1987 for Lwe Horton distributors, in a run of 5000.