JHT:
According to the Browning web site, the original BLR was introduced in the 1969. It was produced in Belgium from 1969 till 1972 (from 1973 on, all models have been built in Japan).
Here is a chronological history of the BLR, as best as I can determine:
Produced in Belgium from 1969 - 1972
Produced in Japan from 1972 to present
Original BLR made from 1969 till 1980 - concave-sided steel receiver, protruding magazine
'81 BLR made from 1981 till 1994 - straight-sided steel receiver, flush magazine
BLR Lightning made from 1995 till 2003 - aluminum alloy receiver, folding hammer, pistol grip stock, long and short action chamberings
In 2003, Browning produces New Lightweight BLR '81 - straight pistol grip brought back
In 2004, a limited run of Stainless New Lightweight BLRs ‘81 with a grey laminate stock are produced.
In 2005, Browning adds BLR Lightweight ’81 with a Pistol Grip - includes a Schnabel forearm.
In 2006, Browning adds a stainless steel/laminated version of the Pistol Grip model
For 2007, Browning is introducing a take-down version of the BLR.
You can definitively age your BLR at the following website:
http://www.browning.com/services/dategun/index.aspNeedless to say, I like those BLRs.
1977 .358 BLR
1980 .358 BLR - original owner
1987 .243 '81 BLR
1991 7mm-08 '81 BLR