Bruce,
I got the info from a Chinese gunto forum in China (similar to NMN) where most of the gunto and nihonto enthusiasts import their swords from Japan. This sword was posted a few days ago and questions were raised by many collectors. As more collectors put in their opinions and someone brought up that the recent improvements of mei faking/engraving skills, done by the sword smiths working in Longquan, a city that is famous of making swords ( mostly replicas ) . The photos of the tang with alleged fake mei were posted by one of the collectors.