RARE vintage Amano bluebird cardigan

Very rare! Vintage Amano knits bluebird cardigan. 100% wool, hand made. No size marked but my best guess is a large or oversized/boxy medium. In great vintage condition! On the back there is slight discoloration near some of the birds feet - I tried to capture a photo but it’s very faint. (I think this just might be a light color transfer from the yarn used for the feet) 24.5” pit to pit 25” shoulder to hem