Anyone know these marks?

[Boomer]

Found 2 bottles with this mark. the smaller bottle only has Roman numeral 3 after the z over a 3 or whatever the first symbol on the left is. The substance in the small one is very sticky.

 

[cowseatmaize]

that's an apothecaries' symbol for ounce.

 

[Robby Raccoon]

1890s to now.

 

[botlguy]

And to state the obvious, the XVI is Roman Numerals for 16 (10 + 5+ 1) Jim