Hi, welcome to the forum. You write about five marks but show only three marks. Why not show all marks and item?
Yes, Dutch solid silver indeed. The H2 mark in oval is the assayers mark for; Johan Daniel Houtman active assayer cities of Groningen, Zwolle & Amsterdam during 1862/1900. The number 2 indicates 2nd standard silver .833 fineness. The Gothic I is the year letter for 1893.
For Dutch (hall) marks see:
viewtopic.php?f=5&t=32028
Assayer's identification mark information see;
viewtopic.php?f=5&t=28590#p83316
The maker's mark is not clear to me.
There als should be a standard mark, the lion passant and an office mark or Minerva head?
Peter.