I bought a La Pavoni from sleezeBay with a changed plug like that. When it took over one-half hour to heat, I realized I'd purchased a 240 volt machine. The seller failed to mention that fact.
I couldn't help but ask the guy about the plate details having read these posts. I am in Australia (240V) but certainly don't have a lazy US1000 that my wife wouldn't miss on an overpriced albeit very, very rare Cremina.
The guy is back and acts a bit more savvy... He still has not got a clue. Changed the wording a bit and back in action. The original was word for word from the Aussy one. -Richard