Stevens Model 254A 20 Gauge Shotgun

Can anyone provide any info regarding a Stevens Model 254A single shot 20 gauge shotgun? Everyone seems to think I am confused with a Model 258A. The differecnce is that the 254A is true single shot bolt action. The 258A is a bolt action with a magazine. I would like any info regarding age, value or any other that you might provide. The one I have is in above average condition and fun to shoot. THANX!