When looking at Leopold Wiener, it only gives 20 coins
https://en.numista.com/catalogue/artist.php?id=277
So does the link provided on the engravers page (20 coins … all seem to be patterns, only 1 of the circulation coins shows up):
https://en.numista.com/catalogue/index.php?g=%22L%C3%A9opold%20Wiener%22&ct=coin&p=1
However there are 63 coins that all point to that exact engraver page … (3 of them are from his brother Charles = patterns for Portugal)
https://en.numista.com/catalogue/index.php?r=&ct=coin&im1=&im2=&tb=y&tc=y&tn=y&tt=y&tp=y&cat=y&ru=&ca=3&no=&v=&i=&b=&ie=&u=&a=&dg=&m=&f=&t=&w=&mt=&g=Wiener&se=&d=&c=&wi=&sw=
When searching without the accent on Leopold the missing 43 coins show up … even though they also all point at the same engraver page …
https://en.numista.com/catalogue/index.php?r=&ct=coin&im1=&im2=&tb=y&tc=y&tn=y&tt=y&tp=y&cat=y&ru=&ca=3&no=&v=&i=&b=&ie=&u=&a=&dg=&m=&f=&t=&w=&mt=&g=Leopold+Wiener&se=&d=&c=&wi=&sw=
Help!