BSA light pattern query

[BC312]

You also have a standard pattern cocking lever. Have you inquire that it may be a light pattern or junior model of a standard might be a rare one. Whats the serial number. You don't want to get rid of it or alter it if its a genuine mod for a customer by BSA you might regret getting rid of it as a rare bit of kit. I assume the trigger block was changed thats if, as an improvement over the early trigger units.
Although you have the gap for a tang on the trigger guard area on the stock, how do you know that the stock is a replacement, the original stock broken. With the trigger block and cocking lever of a standard, i would be more inclined to think the stock is the odd one out, although both light pattern and standard stocks are similar in shape.