K C M H

[bearkat]

I think the hospital at Barming,Maidstone was the Kent County Lunatic Asylum and later became Oakwood Hospital

[bearkat]

It was Maidstone on the example I found. 

So it could have been Maidstone of Chartham??

[Heinous]

The Asylum at Barming Heath was known as the Kent County Asylum, later Kent County Asylum No 1 (when No 2 was opened at Chartham for East Kent).With the NHS in 1948, it became Oakwood Hospital. I don't think it was ever formally known as Kent County Mental Hospital, though it's possible that it was referred to in that way internally.
Medway patients would normally have been admitted there, not to Chartham (Later St Augustines), which served Ashford, Dover, Folkestone and Thanet. Canterbury patients would have gone to the Canterbury asylum (later St Martin's Hospital), which became an annexe of St Augustine's in 1948 taking mostly elderly patients until St Augustine's closed in the 1990s.

[petmas]

Photos & info on http://sussexhistoryforum.co.uk/index.php?topic=5279.0  The new Maidstone Hospital was built on part of the site