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Roger Dubuis

It is often said that the exploding numerals

 

were introduced by Patek Philippe around 1910 and I have found a site where a piece from 1910 is presented and said to be the earliest known made by PP. 


Of course, one can’t be completely sure, but it seems likely…

https://www.bogoff.com/pocket/8255.html

https://wofswatches.com/products/1920-art-deco-banana-tank

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