sorry about the confusion. What I meant by (2) "signed and Glassform" is indeed the same as (1) but without the unique number. Therefore I meant engraved with the name J.Ditchfield. However this is always, in my experience, in the same script/style and therefore is usually stated to be done by John.
A number of pieces have been seen with imitation Gold stickers on their bases so I am always wary if there is no engraving. However this frog certainly looks right.