Vtg Art glass Bluebird of Happiness By Leo Ward collectible NOT SIGNED For Sale

Please see last photo which came up upon google lens search. It seems similar item sold years ago and is no longer available. I looked for signature on this piece but can’t find it ( would it be possible the artist signature is somewhere else not at the bottom ? The sticker was pulled off when I bought it at a local estate sale. The other bird in the last photo said signed and I tried seeing where they had the artist signature photo but due to being sold only the listing photo comes up and when you click on it it takes you to recent listings. Advise welcomed. NO CHIPS OR ANY OTHER CALL OUTS. Will ship securely in a box.