How old is the photo?

Hello

so I guess that on 1860 to 1930 with the focus after 1870 before 1914

After 1870 individual portraits were “payable” for the bourgeoisie before there were almost only family group photos or in Germany there were the vintage school and regiment photography. They were introduced by Bismark as an economic promotion for photography each clothing city had a photographer

The script came to the end of the Biedermeier and was then used by the Art Nouveau period until the 1st World War. Some photographers made several font masks or went with the “Mode”. In the city with competition was the more common in the country without competition there was no reason

In 1925 there was only one photographer Richard Hillebrand in Wallstrasse 3. Many brothers craftsmen have been turned to GbR after 1900. The GBR came to the standard from 1888 but only after 1918. Handicraft photographers became GbR with shop but often OHG

https://martin-opitz-bibliothek.de/de/electronic-lesesaal?action=book&bookId=0462309-1925#lg=1&slide=108

http://www.orf-oberschlesien.de/neustadt

Until 1900 photographs were produced on glass plates and then converted as a contact copy to photo paper or laminated cartoon only with the roll film the magnifications on photo paper came but that was quite expensive at the beginning. Only after 1890 came the pancromatic plan film without glass beams in Europe, and first in France there were many photographers from Daguerreplatte moved to dry film and skipped wet plates. Most craft photographers, however, have freshly cast the glass plates themselves until the 1940s. Fresh (moist) Guss has sunlight at noon with “faster” f8 optics by 4 seconds closing time. When the casting was dried, the closing time went into the minutes. Therefore, until 1914 travel photography was made with dry plates and studio photography with wet plates but there were also the wet after 1880 travel photographers. In the studio, the egg watch was usually set after casting or it was poured into virtel hours because as a photographer had to slide to the exposure time to adjust the drying time in the first minute, 2 to 4 seconds after 5 minutes it was necessary for 30 seconds and after 10 minutes the plate was in the minute range. My Ururgrossvater has a fragrance mixed in because caste was then able to smell the required exposure time or as long as you had slight tear flow in the eyes the plate was still wet (or “sharf”)

So for a glass plate direct copy, I hold it for too “sloppy” that is more a repro of the original or a “fast” copy after years archive storage of the glass plate. However, a photographer/laborator would have retouched the cracking structures and removed the hair (other is in the casting).

When you get the picture from the glass frame you might find an archive number and date on the back, sometimes also names. But it is risky, usually the emulsion layer sticks in spots on the inside of the glass and then the white “pigment spots” or often there are large-surface adhesions in the middle.