Very cool!
Having recently added 13.21 to my collection, I do want to search at some point for a 13.20. Thanks for sharing!
I think if you are fond of Minerva movements and you’ve already got the 13-21.
You may consider 16-29 (montblanc) or 17-29 (vintage Minerva) and cal. 19-9 if you don’t mind large -sized chronographs (46mm)
This is an easy one ;-)
but even when you compare Minerva from the Gnutti time with its successor you will see huge difference in finish and decoration
