hi - looking at your jug I think we're back to "this is wheel engraved and not acid etched". With a loupe/lens, look at those matt decorated areas and you should see the scratches created by what would have probably been a small copper wheel. Some form of past or liquid grinding compound would have been used, since copper on it's own isn't able to grind glass. Think I can see some larger circular or oval lenses - these would have been made using a larger grinding wheel, and then polished.
In this instance it is your handle that is more of a guide to age - it's a strap handle and would have been attached starting at the bottom and then taken to the top and stuck on while still plastic - indicating your jug was probably made before 1860/70. After this date, handles were attached in reverse order, apparently it makes for a stronger join between jug and handle.
The depression under the foot is often an indication of quality, but is also seen on many pieces of everyday glass that were made well in towards the middle of the C20.
Had this damage occurred prior to the 1920s, it may have been repaired if the owner considered it to of some value, and not always monetary.
Holes would have been drilled through the handle and into the body of the jug and a double ended staple or rivet inserted, sometimes glue would have been used as well. You can still find jugs, mugs, tankards and similar where this sort of repair has been made - although possibly seen more often on ceramics.
Unless you're going to use this for breakfast, dinner and tea tables, then I'd leave well alone and admire the jug for what it is, faults and all.
Of course you might contact a ceramics expert who quite likely quote you for the repair, but probably going to cost a lot more than the purchase price of the jug.
As to actual date - difficult - could be anywhere from 1840 to 1870 if I had to guess, but a nice find whatever.