Agree with Lawnboy.
Everything about the style of plaque, artwork, and visible wood for rail, says "pre-WW2" to me unless Jos.Palen was a custom maker. (I used to make parts & tools for a custom table builder in the 60's - early 90's. Some of his products with T-rails looked classic antique unless you got under them).
That said, "value" is probably pretty low unless there is something very distinctive about it or if documented that Teddy Roosevelt had an action match on it
. Everyone wants BBC, or for modern tables, Diamond.
It could well be an exceptional table, though. You'll have to ask your table tech to analyze that. Depends on how the frame was built, the rail system & attachment method, and condition/quality of the slates. If the bones are good the cost could be similar to re-building a later model table, but it might be more attractive/appealing to many of us. Unfortunately less likely to get the re-build costs out of it on sale compared to the current favorites.
Better pics sure would help.
smt