Hello Kiltpin
I'm not sure were it came from myself.
Its possible it was just adopted for personal use, I know some members of guilds etc had Arms and Crests granted to them but some guild members or wealthy Gentlemen assumed personal crests and had silverware and rings engraved with the them but didnt adopt a coat of arms.
Crest seems to entwine the Occupations of Thomas Dudley, Vintner and Member of the Worshipful company of Vintners 1615-1648 and Henry Dudley, Esq his son who was a Royalist Lieutenant in the Civil War.
Does All Proper mean natural colour? I would assume Silver/Grey armour and green leaves and purple/green grapes?
Although the Dudleys of Swepstone/Odstone/Cosby are apparently through research done by Dean Dudley who published the Dudley family geneaology publications that these Dudleys descend from Richard Dudley of Clopton, Northamptonshire but doesn't say how. The Dudleys have held Clopton as lords of the manor since the 1300s.
On the Visitation Pedigree supplied by Thomas in 1634 for 'Dudley of Swepstone, Leic', No Arms or Crest were given but the Term 'Vide Leicester and Northampton' is mentioned at the top which means there is some connection between this pedigree and the 2 Dudley pedigrees mentioned in the Visitation of Northamptonshire, although I havent been able to find a connection between them but younger sons on the clopton pedigree are not documented in their descent.
The arms and crest used by the Clopton Dudleys until the Baronetcy died out was - 'Azure a chevron or between three lions heads erased argent'
'On A Ducal Coronet Or, A Woman's Head With A Helmet Thereon, The Hair Dishevelled And The Throat-Latch Loose Ppr.'