Here is a more complete history
Bulldog Brand Knife History
Charlie Dorton had the first Bulldog Brand Knife produced in 1978 in the Friedrich Olbertz Factory in Solingen West Germany. Bulldog Brand Knives are still produced in the same factory. Bulldog Knives have five important periods in their existence; collectors refer to them as different generations.
First Generation. 1978 – 1987; Thirty two different patterns were produced. Out of 32 patterns came 469 styles. A Bulldog Brand Knife Collectors Club was formed in the early 1980’s and a number was assigned to each knife as it went to a customer. There were no Bulldog knives shipped into the United States from late 1987 to 1992.
Second Generation. 1991 – 1992; Jim Parker purchased the Bulldog Brand Knife Company. In 1992 the Olbertz factory shipped about 7,000 Bulldog knives to the USA. Later, some knife parts were purchased from Blue Grass Cutlery to complete additional Bulldog knife sets.
Third Generation. 1993 – 1995; 17 new knife patterns were ordered from the Olbertz factory and 5 new handle materials were introduced. Oyster Shell handle material and Lady Leg knives were introduced in this year. The third generation knives ended the era of the two “Fighting Dogs” stamp.
Fourth Generation. 1996 - Early 2000; Jim Parker commissioned an artist to draw “Lucky” Mrs. Parkers purple ribbon bred American Pit Bull Terrier. This drawing appeared as the new Bulldog Knives trademark in 1996.
Fifth Generation. 2000-2003; According to Jim Parker’s Pocket Knife Traders Price Guide, the double dog head stamp was introduced around this time.
2004 Silver Anniversary; This is the Year of the Reintroduction of the “Fighting Dog” Tang Stamp. 25 Year – Silver Anniversary of Bulldog Brand Knives
2005 – 2008; February 2005, Bulldog Brand Knives retired the Double Dog Head Tang Stamp, and replaced it with a single Fighting Bulldog Stamp.
A trademark has to be used every three years to keep it active, so a few knives with the rare two “Fighting Dogs” stamp are released every few years.
The Bull Dog Brand Knives are 100% Completely Handmade in Solingen, Germany by Master Cutlers. Each Carbon steel blade is individually hammer-forged with over 240 hand operations going into each knife, then each blade is reverse frost etched with the Double Dog Head logo. Nickel Silver Pins and Shield, and Brass Liners add to the top quality craftsmanship.
Sixth Generation – 2009 to Present; Bulldog Brand USA Knives are being manufactured by Great Eastern Cutlery in Titusville, PA and models are product by Queen Cutlery in Titusville, PA. Bulldog Brand USA Knives are high quality Knives, made in the USA, that carry on the Bulldog Brand Legacy.
Source: "Pocket Knife Trader's Price Guide Volume 8" By: James "Buzz" Parker and Ed Henley
And my knife in Himalayan rams horn when it was new
Pete
Thanks in advance for anything you can share 
