Badge recognition assistance

[GearDownFlaps]

Troops , Just quickie , I am trying to find out more about my Grandfathers service history. He was a Nav on Avro Ansons 43-45 and whilst rummaging through his bits and bobs I came across this badge stuck to his Nav Brevet.
Does anyone have any idea from whence it came , I have trawled and trawled without success , but then I'm no internet genius

Welcome to Facebook (http://www.facebook.com/#!/photo.php?fbid=479471888963&set=a.88688033963.83042.537018963)

[Old-Duffer]

I can't get to see your picture without registering for Facebook (no chance!!).

Please give a brief description of what the badge looks like and i shall consult my book of badges various!!

O-D

[GearDownFlaps]

Ah sorry I have no other idea how to get it on here
Its a coat of arms shape with motto ET-VIRTUTEM -ET MUSAS
at the bottom
then above bottom part of shield is red with 3 yellow diagonal stripes going from top right to bottom left
above that is a 3 mast sailing ship in gold on blue background

[green granite]

Ah sorry I have no other idea how to get it on here

GearDownFlaps read:
http://www.pprune.org/spectators-balcony-spotters-corner/203481-image-posting-pprune-guide.html

[Biggus]

It appears to be a motto used more than once:

A similar badge..

ET VIRTUTEM ET MUSAS Badge on eBay (end time 26-Nov-10 22:05:36 GMT) (http://cgi.ebay.co.uk/ET-VIRTUTEM-ET-MUSAS-Badge-/110614738057)

A school with the same motto..

Mill Hill School - About Mill Hill - The Coat of Arms of Mill Hill School (http://www.millhill.org.uk/popups/school-staff2.html)

But I haven't worked out what the latin translates to as yet...

[Sun Who]

No idea what the badge is (without seeing it) but I think the latin translates as 'and valour and song' or 'and virtue and music' or something of that ilk. I believe musas is the accusative plural of muses. Good chance I'm wrong though.

Sun.

[Tankertrashnav]

I'll have a go at "Both by valour and by learning", but havent done much Latin since I passed it at O-Level in 1964! Probably the guy's old school prefect's badge or something similar. Not a lot of help, just my two-pennorth!