These next plates are taken from Fashions in Eyeglasses by Richard Corson. Unfortunately he does not state where he got the engravings from. BUT! I have found images of some of the real specs. So, although these are still on par with Norris for being possible redrawings - they are pointing in some very clear directions that do have physical backups.

1. 1510 Italian
2. 1500 - 1550 English made from horn
3. 1500 German - made from horn
4. 1583, German (Dresden). Leather and horn.
5. c. 1600 German. Leather and horn. From a manuscript in Nürnberg.
6. c. 1600 German. Leather. From a manuscript in Nürnberg.