Souvenir from the early days of Canadian Jet Propulsion Technology

Mybe the brass plaque has noting to do with the vanes?

The marble(?) base looks different to the others. Less white marbling as if its from a different block (quarried from another location).

Its a different size to the others as well, which would be odd if they were made as a trio.

The type is different as well between the vanes and the brass plaque. And a different method appears to have been used to engrave them.

Well the Chinook first ran in 1948 and the Orenda in 1949, so I don’t know how that fits with the plaque date of March 1947