Featured Nineteenth century glass intaglios?

Hello! More auction pick ups (I liked the look of them but know very little about them). These were listed as, "Nineteenth century glass intaglios". Are they intaglio seals? Do you think they are 19th century and if so are they early or later? Any info you can provide on any of them would be wonderful, thank you!

 

They look moulded rather than carved.

 

A very nice handful, that!

 

@Bronwen

 

Vice Admiral Howe; King Charles V, signed by Brown (Charles or William), possibly part of a series of the kings of France; Pope Urban VII; Roman emperor Augustus (I think); Hercules; and what looks to me like a tavern scene.

The last on the list certainly looks knocked around enough to have been actively used as a seal. Others may have been higher end collector's pieces, for people who could afford something more than plaster or sulfer. They are all molded & do not pretend otherwise.

Dates for Howe & Urban would tell you the oldest those 2 pieces could be. The image of Hercules is ancient; this is a repro. The fad for collecting impressions & reproductions got a big push when Catherine the Great commissioned a set in colored glass from James Tassie.

 

Thanks so much, wonderful info!