Looks like 37J1, a navy variant as Dr H mentioned above.
repro is out in the market by the Real McCoys Japan: http://www.superdenim.com/prodpage.asp?productid=3841
It was discussed a while ago on FL as well - last year when it came up for auction?
Technically not an A-1 (as it's the naval variant), but not splitting hairs...
Bill Kelso offer a nice example of this 'Admiral' 37J1 in capeskin - it really looks the part.
I have an A-1 from the same company (single button collar knit) in a darker cape and the workmanship is superb.
...and it'll be much, much cheaper than £1750
Here you go: https://www.facebook.com/media/set/?set=a.679591822071112.1073741974.540638042633158&type=1
The BK Facebook page.
Thanks very much Doc. This A1 is exactly the type I'm feeling atm. The others on their site just don't do it the same way for me. I'm assuming that one is the victory capeskin.. it is isn't it?