Hi and WELCOME @SeminoleNative, Great to see you got your image posted in the Gallery!! It's always best to then, or directly from computer or phone, to post them full image in the forum you want them in....Eye glasses could be tricky!!! One of the Moderators can move them if they think there's a better place!! I'll post them here for you.....ooopsie....also each image MUST be UNDER 1 MB.....I resized it down for you....
Just in case you haven't been perusing the site before signing up (not required at all, but many do!), here is some help in posting images from a computer or an android or iPhone. For Future reference, when posting images: Each image MUST be UNDER 1 MB.... There are instructions on site here on how to reduce the size of your image, if that is the problem......you are allowed up to 10 images per post!!! Here are some links to the instructions: Try emailing them to yourself as "medium" size, they should then be under 1 MB! If on the computer: https://www.antiquers.com/threads/posting-a-thread-and-uploading-pictures.15990/ If on an iPhone: https://www.antiquers.com/threads/resizing-photos-on-i-phone.35097/ And if on an Android phone: https://www.antiquers.com/threads/using-an-android-phone-for-pics-on-antiquers.41709/ As an added note, when you have your photos LISTED, BUT BEFORE you hit POST, please click on the wording that says to "INSERT EVERY IMAGE AS FULL IMAGE" !! That way, we're not clicking on little thumbnails, but get to see all of the images full sized!! Thanks! Remember, it takes a bit for MOST new members to get the hang of it, but it's really quite simple once you get used to it!!!" AND Happy Hunting!! Others should be along with more help with manufacture.....you didn't see anything on either side of the nose rim???
I did do a little checking....try clicking on this link....and I also clicked on the heading "FRAMES BY DECADE" near the top.....at least a place to start maybe.... https://vintageopticalshop.com/vintage-frames-1900-2000/1880-1920.html
Windsor on the bridge. Just trying to find date when the bifocals came out. And thanks for the notes.
What type of bifocal is it? The photo really doesn't show it. https://www.2020mag.com/article/a-l...cal-designs-of-the-early-and-mid-20th-century
An ophthalmologist is a medical doctor and in most cases would not know anything but modern types of bifocals. An optician might know something about them,but modern training is lacking in many areas.
This looks like a good resource to start finding the answer to the question. I agree that the photo doesn't show the bifocal...
Actually, I just looked and see there are some better photos there. By now, @SeminoleNative has probably looked at the link that Hollyblue posted.