Chasing Embers, Did you get a box with those pipes ? I don't believe meerschaum pipes are signed or stamped. Some meerschaum come with a signed slip in the box with the carvers signature and name and date. If you really want to pursue it I would send a phot and e-mail to Sadik Yanik who is a master carver and seems to be the only person that I could find that carves pipes that large and ask him if its one of his pipes. His are frequently museum quality like yours. Here's a link:It really surprised me. The specifications listed at SPC reflected its size but seeing it was still something else altogether. They listed it with AKB pipes because they had no other listings for meerschaums other than IMP but those have the brand insignia on their stems. SPC had no idea who made it and something that large with that much detail more often than not bears its carver's signature. It is a bit of a mystery.
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SMS Pipes - Smoking Pipe - Imported Pipes from Turkey and Italy - https://www.smspipes.com/index.cfm/fuseaction/learn.about_Sadik_Yanik for more info.
The link shows some intricate carvings like yours ! Worth a shot ! Good Luck !