Folded link could well be correct, rather than the riveted link. Indeed, the former is probably a sturdier design and I am not a fan of the rivet. Can usually pick up a "solid" 78350 later if you want to.
There is no quick-set date change facility on the 1570/1575 calibre in the 1500, which can be a pain. Dials etc also much harder to come by.
The 15000 introduced the 3035 calibre with first version of the quickset and in my opinion is more useable for having it.
H