I know most on this site don't like reproduction signs but I have an older A.O. Smith 483 and looking for the porcelain signs for the front are very expensive. I found a repro. porcelain coated sign on E-bay that is very reasonable. What is odd is all these repro's show a manufacture date of 5-21-90. Wondering if anybody knows about these signs, Most are the Sky chief variety with prices fluctuating high and low. I don't see many Fire chief. Thanks