strangely i allso got one on saterday 
Osprey Elite book on the Recce Corps,
team shoot and scoot, TL
Oh, and the unusual webbing water bottle had a 1953 date on it, so it's not that interesting now!
Don't be disheartened by it, I've got a '30s/'40s one like that. Mine is very similar in construction to the normal 'frame' bottle holsters (but with the obvious ommision of the locking straps), except that it is finished with two loops anchoring two small metal hoops/rings to which a thin [thinner than normal webbing] over-shoulder style strap in buckled to. I think it is type of holster initially provided for the second bottle which normally lives in your small pack. Sorry, can't get pictures of it just yet for comparison.
EDIT: Just bothered to look back in this thread to see your original picture, and it's exactly the same as the one you've got there, except war dated. So, it's hopefully not as duff as first thought.
A Proud Member Of 'Team Spleen!' who play mainly at Gunman Airsoft, Tuddenham, Suffolk.
I think rich and i found out on sat its a cavalry one.
"I think we are in rats' alley - Where the dead men lost their bones."
It has also been suggested to me that, that type of waterbottle was for cavalry usage... meh...
Which make sense as cavalry were not isssued with 37 pat webbing (they got the 1903 bandolier and belt - i've got one upstairs...) so would have no way of attaching a regular frame or envelop bottle carrier.
"I think we are in rats' alley - Where the dead men lost their bones."
Some tunic "bling" came today, my sniper badge and a tank destruction badge (technically entitled to both!).
When I want your opinion - I'll tell you what it is!
10 copies of the "Back to the Bocage" photoalbum of my own design, for a friend to take with him to the US to give to the 2nd Armored veterans 
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One m43 tunic in dot 44 camo - hbt
One pair of matching trousers
Both bought from Spearhead - very good prices, very prompt delivery, ie 13 days from payment via paypal to them arriving at the house -
Good quality, too - not so good, however - I ordered the 'vintage' version of both items and received less expensive, untreated items - I have sent an appropriately polite message and am waiting on the reply - 
yah a dirndlbluse 
1 third of the ensemble here
Two sets of majors epaulettes and lutzen from the states for $17 posted. Not sure about the lutzen , solid metal stampings instead of wire ? No idea if this correct or not .
Replicaters Denim Battledress uniform and a Denison Smock.
haven't seen 'em yet, but the gf's just told me they've arrived at home!
Just in time for the training day!
1918-Dated US Army Waterbottle for my WW1 outfit.
Also got an M1916 Pull-over shirt comin' in the mail.
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Incredibly awesome japanese army tabi boots.
Ninja tastic
"I think we are in rats' alley - Where the dead men lost their bones."
Osprey men-at-arms German elite units.£5 ebay!
If its passed 9 there is a 95% chance im pissed.
Great stuff Blom, you keep up wiht the research and iut will be you answering all the questions soon!
"I think we are in rats' alley - Where the dead men lost their bones."
Just brought Osprey partisan warfare aswell,should be usefull for the Ruski warfare £5 ebay! I love the osprey books sounds abit childish but i love the pictures/drawings.
If its passed 9 there is a 95% chance im pissed.
We all do mate, its the main selling point the drawings are awesome
Volstadt does the best ones IMO, he does most the german books.
I have about twenty osprey at home, if you want to lend some thats cool
Oh and you can borrow my full webbing set for sunday but if you break it you replace it ok
"I think we are in rats' alley - Where the dead men lost their bones."
We all do mate, its the main selling point the drawings are awesome
Volstadt does the best ones IMO, he does most the german books.I have about twenty osprey at home, if you want to lend some thats cool
Oh and you can borrow my full webbing set for sunday but if you break it you replace it ok
Yeah,i wont break it
If its passed 9 there is a 95% chance im pissed.
Having mistakenly sent me the non-vintage camo items, Spearhead have offered to refund me the sum of $15 US - something at least, and absolutely no quibbles - so I will no doubt use them again -
Barrys aweseome
As i was return customer he basically let me pick and choose various bits i wanted at a uniform 'deal' price.
"I think we are in rats' alley - Where the dead men lost their bones."