There are 6 nice Liqueur Pineapples with very beautiful breakthrough work,

At the edge there are 4 brands:
1. Austria-Hungary silver hallmark 1867-1922: Dog Head 3= (silver fineness 800)and Assay City Letter “2H”
2. 2x the brand “H2”, I think it is also the assay mark, but do not know if this stands for Hall(until 1872) or Bregenz(from 1872)
3. a master mark „JM“

It would be great if somebody could help me with the riddle „2H“ and decrypt the manufacturer.
Any help would be greatly appreciated. Thank you!
Gerox