BTJ Stand for Bellmore Johnson Tool Co. It is my understanding that American Derringer picked up the rights to make this derringer and is in Blue Book under DA 38 Special...I found the following info on this derringer below from various internet sources that is interesting.
The original BTJ Stand for Bellmore Johnson Tool Co. It is my understanding that American Derringer picked up the rights to make this derringer and is in Blue Book under DA 38 Special...I found the following info on this derringer below from various internet sources that is interesting.
The original DA 38 Derringer was made only in 38 special chambering.
The logo "BTJ" Bellmore Johnson Too Co . (the "T" is in the middle as a stylized logo)




The DA frame is aluminum and the barrels and latch are stainless steel. The stainless castings were made by Pinetree Castings, the same company that Ruger often used.
The original BJT derringers did not actually have wood grips but are made from a composite wood look-alike.
Later, the rights to manufacture and leftover parts were bought up by American Derringer Corporation, who began making these in 38 Special and 9 mm para. The earlier ADC-DA derringers have the BTJ logo and the Hamden CT address since they were leftover and already stamped by BJT. was made only in 38 special chambering.
The logo "BTJ" Bellmore Johnson Too Co . (the "T" is in the middle as a stylized logo)

The DA frame is aluminum and the barrels and latch are stainless steel. The stainless castings were made by Pinetree Castings, the same company that Ruger often used.
The original BJT derringers did not actually have wood grips but are made from a composite wood look-alike.
Later, the rights to manufacture and leftover parts were bought up by American Derringer Corporation, who began making these in 38 Special and 9 mm para. The earlier ADC-DA derringers have the BTJ logo and the Hamden CT address since they were leftover and already stamped by BJT.