Curious about these drilled and soldered stems I'm finding on '39 and earlier M51's and M5's. I have yet to come across an L&L M51 that has the stem drilled and soldered. I noticed that all I've seen are milled and pinned for an inline bowl whether they are stamped M5 or M51 which I assume is just the way they were made. The drilled and soldered part has me stumped. Did they come from the factory this way, or was this done later as a repair procedure for some reason?
M51
M51
M5
M51
M51
M5
Comment