Hi David,
As discussed the other evening, Junior sears may have been marked J7 on Webley parts lists but not all interchange. I have several in my spares box and not all fit the same pistols. I appreciate some hand fitting may have been necessary but wierd that a spare may not fit without a little work. From memory, I think the sear pivot hole location varies on some sears in a minor but significant manner.
Kind regards,
John