There are a rash of fake makers marks out there.  First of all:

JR Gaunt London were a reputable firm and about 1941 or so they did have a JRGaunt London mark on the sliders of some of their cavalry and yeomanry badges.  The lettering is tiny.  I show a picture of a genuine 2nd Northants Yeomanry badge with that mark.  This is one of the most widely copied Yeomanry badges and should not be trusted with lugs and/or solid front legs.

From the late 40s onwards they had a large font JR Gaunt London mark which is seen on most 1950s badges both brass and a/a.

You also find JR Gaunt Bham on a/a badges of units that existed after 1958.  Gaunt moved production to Bham in the 1970s and restruck a lot of scarce badges - particularly Yeomanry ones.

There are also a JR Gaunt.London sliders - note the full stop and the medium lettering - this is a mark of a fake! I show a fake badge with the wide feathers typical of the fake welsh/cavalry/yeomanry badges who all have these dumpy feathers.

Also any WD and a crows foot are a recent fake mark and Marples and Beasley really cannot be trusted on ORs badges.