Vintage Ship Nautical Caution Sign

From a local estate, great looking nautical sign. Measures 9" by 4-1/2" by 3/4". Very good used condition. NOT a reproduction. The sign looks to be enamel that has been framed and has a plexiglass cover. The wood looks like oak. Overall, this is heavy for its size. The metal frame shows corrosion from either salt or fresh water. The plexiglass frame shows scratches and general use. The varnish on the wood is missing in spots. I don't know the age of this, but look like late 1960s to 1970s.
If you have any problems with your purchase, please let me know so I can make it right. I try to describe my items to the best of my ability, but I can't be an expert on everything. Payment must be made within 4 days, unless other arrangements have been made. I'm happy to combine items to save on postage. I pack very carefully but cannot be responsible for any damage once I deliver the package to the Post Office. Insurance is always available but that is up to you. Please ask questions before bidding. Items are refundable within 14 days excluding postage and the buyer pays return postage. I ship to the United States only.