https://gmtmaster1675.com/
I haven't seen this posted here yet so I thought I'd share. I had a difficult time telling just by looking all the nuances between the different 1675 dials and how to identify a watch that was all "correct" since very few surviving 1675's are. I found this to be a great resource especially when it comes to the different dials the 1675 came in and how to identify all of them. Click the "Gilt" and "Matte" dropdowns to see what I mean. Hope this helps anyone out there who is interested!