I have been hunting best prices for 520nm diodes for the last few weeks, and I have probably contacted 10+ sellers in China. 9 of them tried to sell me a NDG700 as a 1W 520nm diode! I have yet to find one of them actually selling the NDG7475 as the “1W” diode. Just make sure you contact the seller, and ask for a spec sheet if necessary!
I did come across one seller on eBay that was selling the NDG700 as a 500mw diode, he was the only chinese seller that I have found selling the truth, even if it’s at a high price. I would highly recommend anyone reading to visit DTR’s Laser Shop before making a purchase from any chinese seller on eBay! He is the only trustable US Laser Supplier I have found, and he ships fast. I highly recommend him over anyone else when it comes to laser diodes in the USA.