I originally wrote about the entire Dinky Toys 40 series in 2019, including the 40e Standard Vanguard.
Dinky Toys were quite accurate models of real vehicles produced at that time, but over the years, some of the real vehicles underwent significant changes to their appearance. Not always, but sometimes Meccano noticed these changes, and decided that they needed to modify a Dinky Toys model, to make it more accurate and representative.
A case in point is the English made 40e/153 Standard Vanguard Saloon. When this was first introduced in 1948, it appeared with open rear wheel arches, which mirrored the real car at that time. However, by 1950, the real car now came with closed arches or skirts as some call them. So Meccano went to all the trouble to modify the die and change the catalog and box images to conform.


When the 40e Standard Vanguard was updated in 1950, both the rear wheel spats were added and the rear axle clip deleted, which also resulted in a newer style baseplate. In 1954, the numbering was changed to 153, and the model was produced through 1959, then deleted from the range.
Here’s a photo showing the two very different baseplates used on the Standard Vanguard. The one on the left, with that unique axle clip was only used briefly, then replaced by a normal baseplate, but with smaller lettering. The other baseplate on the right is a later one, with large lettering.

That unique clip was also used on two French Dinky Toys, around the same time: The 24q Ford Vedette and the 29e Isobloc Autobus front axle. This was a rather complex piece to both make and install, so one has to wonder what the advantage would have been. Apparently that also became clear to Meccano, as its use on the Standard Vanguard only lasted about a year.

Isobloc front end
I’ve never seen anything official from either factory on why it was used or supposed to accomplish, so we are left with another “Meccano mystery”!