I have owned these two stems for a long time.  Not being able to identify them myself I finally decided to ask for help.  I submitted the photos to Replacements.com’s identification service (which is great!).  I received the information that the pieces were produced by Saint-Louis of France.

Replacements’ staff did not provide the line name or any information about an age so I decided to visit the Saint Louis website to see if there was any information.  I saw that there was a link to a Saint Louis Museum (where I must visit some day) and wondered if staff would provide an ID and additional information.

I was put in touch with a very nice woman who did facilitate the search and was advised that the line name is ‘Manon’ and that Manon was introduced in 1924 and in production until the 1930s.

Currently part of the Hermes group, Saint Louis has been in operation for a long time.  here’s some information from their webiste:

“Born in 1586, the Müntzthal glassworks become « Verrerie royale » (Royal Glassworks) in 1767 through Louis XV’s royal seal of approval.

Italy and Bohemia were already producing crystalline, but it was the Englishman George Ravenscroft who perfected the technique for making genuine crystal. In 1781, experts at Saint-Louis solved the mystery.

Since 1829, renamed « Cristallerie royale de Saint-Louis », the manufacture is exclusively devoted to the production of crystal-glass items.”

Great to have help to identify this lovely stem.