OK, second attempt. To illustrate the point I was making about photo sizes, I looked up the pixel/size conversion. On my monitor with a display resolution of 100 dpi these photos are 7 inches wide. However, according to the website, if your monitor's resolution is only 75 dpi, which is common, apparently, then the pictures will be 9.33 inches wide. That's why quoting sizes in pixels would be far more sensible.
These are some of the items belonging to my great-grandparents. They were married in Randers in Denmark in 1869 and moved to England soon afterwards, so all of the items relate to that date or earlier. From this site I know about the three towers mark, although I can't read some of the dates.
The first (probably the oldest) originally belonged to the bride's father. I can see a mark that I think is Peter Hinnerup, but presumably the P Hertz is the father of the one who is mentioned on this site with a date of 1893? And is the 56 a date mark?
This second belonged to the couple. I think the date is 69 and I think the mark is Simon Groth (?), but the same question applies about the identity of P Hertz.