We’ve featured ads that Vulcan put in Engineering News-Record, but this one was a flyer that Vulcan put out about a successful application of a Vulcan #2 in Memphis, Tennessee. The hammer was run using a Littleford Tank Heater to generate the steam.

Part of getting job on time was reliability, something that Vulcan hammers were good at then and are good at now.
Although dating Vulcan literature can be tricky (most of it doesn’t carry a date of any kind) my guess is that this dates from the late 1930’s.