Corkscrews on cover from Romania

I received a registered cover from Romania with complete set Corkscrews II.
The stamp with the face value of Lei 1.60 illustrates a French, artistic pocket corkscrew, from the 18th century. The stamp with the face value of Lei 2.70 is a type of corkscrew made in the 18th century by French jewellers. The stamp with the face value of Lei 3.50 illustrates a barrel corkscrew. A British corkscrew with a Thomason mechanism, with the main handle shaped like an oval, and the second one shaped as a snake, it was produced in Birmingham. The stamp with the face value of Lei 4.00 illustrates a French produced single lever corkscrew, patented by Fernand François, in 1902. This decorated version is called “Le Rapide”. The stamp with the face value of Lei 4.50 illustrates a zig-zag corkscrew, a very rare piece, which, unlike the others in its category, had two sets of levers, separated by a wooden handle. The stamp with the face value of Lei 8 illustrates a pistol corkscrew. It is a French piece, of mother-of-pearl plated silver, which represents a firearm whose trigger is the corkscrew itself. The souvenir sheet of the issue, with the face value of Lei 16, represents a corkscrew patented in 1904, in Denmark. This set was issued on 29.03.2017.

There's also two more stamps:
Hurtu 3½ Quadricycle, from set The Tiriac collection, issued on 30.08.2017.
Flint pistol made in Liege, 18th Century, from set Arms - National Military Museum, Bucharest, issued on 08.02.2008.


Thank you Mihnea!