should fit just fine , these were made and upgraded as they went but the frame they fit did not really change , the photo above indicates what should be in place at the given dates and serial sequence , you can see why i said what i did regarding the serial number , so what did the ones that came with it [the ones in your tool box] look like ?
that's an interesting variant brit plumber , i like the looks of those , would love to know more of the history there ,Information
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