Need help dating vintage Salvatore Ferragamo penny loafers

[theundahworld]

I’m guessing these are 80s vintage based on the following details:

- Worn silver insole logo, zigzag pattern on sole
- Full grain leather, mahogany/burgundy color
- Hard leather outsole, with Ferragamo and size engraved. Ferragamo is also engraved on the wooden heel. Heel also has diagonal scoring for grip.

However, I’m not so sure. Thank you!

 

[poisson_rouge]

I'd say 80s too, possibly early 90s. Also the combination heel is probably leather, not wood