Walking through Portland, Maine on a rainy day I saw this rather glorious ghost sign. It reads
Williams Bros Co. Machinists [unreadable] and [unreadable]
All I can find out about Williams Brothers Machinists is that they were taken over by the Brookline Machine Company in 1985. They still trade under the Williams Brothers name, but in another part of Portland.
Williams Bros Co Ghost Sign
Address: Pearl and Fore, Portland Maine