It appears he used a D hole up until the Integrale vol.5 (So much for the argument against short scale D holes being suited for lead)
It also looks like his first oval hole was a short scale transitional model which I believe is the one on the J'attendrai video
From 1938 he played an oval hole exclusively as far as we know.
I'm pretty sure his legendary #503 was made in 1939 or 1940
So the chronology appears to be that he tried a "modern" oval hole in mid-1937 went back to the "D" hole until early 1938, played a hybrid until 1940 whereafter he had a "standard" design oval hole!!!!! :? :? :? :?
Comments
It appears he used a D hole up until the Integrale vol.5 (So much for the argument against short scale D holes being suited for lead)
It also looks like his first oval hole was a short scale transitional model which I believe is the one on the J'attendrai video
From 1938 he played an oval hole exclusively as far as we know.
I'm pretty sure his legendary #503 was made in 1939 or 1940