I've asked this question a few times, short answer is nobody really knows. The current owner of the records doesn't have the "cash books". The cash books would have answers to a lot of the questions about Lancasters. Questions like who for sure made the "0" prefixed body action guns (Beesley? Osborne? HB&P? Etc ) Who was the house engraver? Unless those cash books are located, we will probably never know.