"Gun Trade" was area by area moving to country by country and now moving to global. Demand and demand for given quality grades is not constant. Neither is supply of materials nor supply of skilled labor. At any given time, WR might have been busy with high grade guns and bought-in a lower grade. Equally, at any other given time, they might have had a backlog of lower grade orders and had to send out higher grade work to the most skilled out-workers. The trade is constantly adjusting to demand. Learning to identify original quality grade is far more important than learning makers' names. Most makers supplied a wide range of OQ. So, you are ill advised to try to use maker's name as a surigate for quality.
