18th C Stockholm Pehr Zethelius sugar urn

[historydetective]

I recently acquired this 9.5 inch-tall, 17.35 Troy ounce, 1798 sugar urn with bas-relief female faces on each side. The marks pictured are on the underside of the base, near the pierced gallery, but there is an identical set of matching marks on the inside edge of the rim of the lid for the high-profile Stockholm maker, Pehr Zethelius. I have a question about the female faces: do the masks depict an identifiable person from Swedish history? I also have a question about the monogram: there seem to be 2 ".." (periods) after the first initial, and possibly an " ' " (apostrophe), but only one "." (period) after each of the other 2 initials, and since we know there were only a limited number of people who could've afforded such an expensive item in the late 18th century, I am hoping someone might recognize the initials of a famous Swede, and I fully concede that it's a longshot, but the unique punctuation and the continued historical focus of Zethelius descendants also suggest the possibility that Zethelius's day books might survive, in which case the client would be listed; does anyone know if the day books exist in any museum or archive? This link: http://www.designmuseum.se/eastwest.htm" onclick="window.open(this.href);return false; shows a very similar piece, also by Pehr Zethelius. The distinctive reticulated gallery and bun feet were used on candlesticks and even on a creamer. This design feature seems to almost be a signature creation of this silversmith. There are very minor losses to the horizontal pierced elements in some places, but otherwise, the condition is excellent. Thanks in advance for any info!

[historydetective]

A friend of mine found the following incredible piece by Adolf Zethelius, Pehr's son, and it features the same face mask. There are also multiple examples online in museums, etc., in which Pehr also used the same mask.

[historydetective]

I think I'm talking to myself and answering my own question, but in case anyone else is interested and happens to stumble on this post, I just bought an 1888 London Wakely & Wheeler magnum champagne caddy (I think it's a caddy) that's 8.25 inches in diameter, 1.375 inches high, and weighs 292 grams, and anyway, it has VERY similar female bas-relief masks, so I guess the masks on the piece in question, the 1798 Zethelius Swedish sugar urn, are not meant to represent someone specific, but rather, are just oft-used decorative motifs: