The bottle can be found at the very beginning of a narrow alley [#1] which you have to enter at the beginning.
After eliminating all the enemies on the square, you should take a closer look at the horse monument [#2] on its right side you will find the bottle.
The bottle is standing on a wall right before the execution site [#3].
Gold Bar 1/10
The gold can be found beside a gate at the end of a narrow street [#1].
Gold Bar 2/10
After you enter the building, right beside the counter by the crates [#2].
Gold Bar 3/10
After killing the first German and heading onto the upper floor go to the very top. The gold is on a wardrobe [#3].
Gold Bar 4/10
The gold can be found right before the entrance to the first bunker [#4].
Gold Bar 5/10
Deeper into the square, right beside some crates by a truck [#5].
Gold Bar 6/10
In the left corner of the square, right behind a concrete pillar beside the fenced passage [#6].
Gold Bar 7/10
In the right corner of the square, at the back seat of the destroyed car [#7].
Gold Bar 8/10
After reaching the second target building and eliminate the soldier and sniper, go up the stairs and head right. The gold can be found right beside one of the doors [#8].
Gold Bar 9/10
After reaching a room with another staircase, head left in the corner of the room you will find the gold [#9].
Gold Bar 10/10
Turn left after going up the stairs the gold is on whats left of the window [#10].