Mid 80's or so.
There is a large serial number database on Glocktalk.com. Some books published on Glocks are available that also contain data.
Check with Glock Customer Service through their website.
Glocktalk.com has an extensive sn database.
Glocktalk.com can assist you.
You need to call Glock
You will have to call Glock with the serial number.
HBHxxxx indicates April 2005 date of manufacture from this link: http://glocktalk.com/forums/showthread.php?t=412093#post4622212
No. Glocks have a a 6 digit serial number. The first 3 digits of the glock serial number are letters and the last 3 are numbers.
Glock will tell you if you call.
Glocktalk has a serial number sticky
No specific characters. Glock serial numbers for a long time now have been 3 letters, then 3 numbers.
You will need to call Glock