I mean that it was a typical limited-edition Plarail train made by Tomy for Keisei to sell through their outlets. The Keisei press release is here.
A few selected extracts from a full translation include:
"Keisei Electric Railway, in commemoration of Koetsu Railway Day, will release these Plarail trains at Keisei Line station stores from Thursday, October 7, 2010.
Prior to this launch they will be released in advance at the Yokohama Train Festival 2010 to be held on October 3, 2010.
Number of units released limited to 3,000 each".
A few selected extracts from a full translation include:
"Keisei Electric Railway, in commemoration of Koetsu Railway Day, will release these Plarail trains at Keisei Line station stores from Thursday, October 7, 2010.
Prior to this launch they will be released in advance at the Yokohama Train Festival 2010 to be held on October 3, 2010.
Number of units released limited to 3,000 each".