QUOTE (Stephen Chambers @ Aug 18 2008, 03:01 AM)

There have been people using camera bags as concertina bags for many years now, but I wouldn't be keen on them. Concertinas of English construction really need to be kept in a properly made hard case, with corner blocks to keep the bellows firmly closed when not in use, otherwise you risk damaging your expensive instrument and the bellows may tend to become (somewhat) sprung open. If I want to carry my concertina more easily and less conspicuously, I'd put it, in its case, inside a day bag. That's how Alf Edwards' concertina got carried safely to the 'States and around Seattle a few months ago.
I would also worry that a concertina would be more at risk of being stolen if it appears to be a camera, and I'll quote Simon Thoumire, speaking of the theft of his own instrument (in Scotland!) on that score:
QUOTE
February 4, 2001
Some terrible news from Simon Thoumire (via Ken Coles): "My 56 key Wheatstone tenor treble Aeola (metal ends) was stolen on Sunday 21st January from the Glasgow Royal Concert Hall. The serial no. has fallen off the left side but it is recognisable from the big thumbstraps that are hanging loose from the side and also sweat has tarnished the nickel plate on both sides. Another feature which will tell it apart from any other is that the top 'C' on the right side is an air button. I think the person that stole it may have thought it was a camera because of the case. It was stolen from behind my chair as I talked to some friends in the cafeteria. I would appreciate if everybody could look out for this instrument. It is the only instrument I have ever played and I miss it badly."
[My emphasis in red.]I don't doubt the truth of what you say Stephen, you have way more experience than me in these matters, but I'd make a couple of comments based on my limited experience and use of the Centon case.
As to support of the concertina. I would infinitely prefer the support provided by the camera case which gently supports on all sides and holds the concertina closed, than a hard case such as my original wheatstone or Lachenal cases, whilst they provide corner blocks, as far as I can see all those do is directly transmit knocks and bumps directly to the body of the instrument. If I were to drop my instruments, I know which case I'd prefer them to be in. A hard clamshell case would be fine but for me that has few advantages over the camera type case.
I'm not sure I understand the camera case = valuable argument. I read up as much as I could on concertina theft both in this forum and elsewhere and as far as I can tell he vast majority of thefts were at sessions and festivals, where the thieves knew exactly what they were stealing. The type of case in most cases was immaterial. Likewise in the street, a clamshell, a camera, a concertina case, all look suitably alluring to a mugger. The answer here has to be disguise or not carrying in areas of risk.
Like all here, I'd be very trepidatious of walking certain areas with any sort of case and would probably use a less valuable looking case where necessary.
As for sessions, festivals etc, frankly I watch my instrument like a hawk. I've not been playing long, and the love affair with the instrument is still strong enough that I could not imagine myself leaving it unattended. All the time I see players leave their instruments - a concertina is portable enough not to leave it.
anyway, just my thoughts. Each to their own.