Hi Graham,
I see what you mean. Would be interesting to know why it may have been changed though? The tritium seems to match very well between the dial and hands. I mentioned to you by PM that my second hand had a slightly different location for the lozenge to yours.
All this stuff is so old, it's surprising to me that any of it has made it through the last 40-odd years. I bet when they were first manufactured the best the companies would have hoped for was for them to last a decade or so.
I never expected to be able to get a Speedy this old, this watch just arrived in front of me one day without any planning. So much fun when that happens.
Regards
Tim