Thanks - some great old knives and examples of propeller shields Gev, Kevin and Lambertiana and Duncan

... Beauty of a carpenter jack too lambertiana

... Thanks Kevin for the catalog cuts - interesting - wish mine still had the etch

!! I do understand that M&G made alot of the carpenter jacks over the years and probably by different companies - I also understand that M&G had lots of cutlery contractors making their patterns over the years but still have no complete listing.. Nonetheless until this thread started showing all these different propeller shields I never realized how they did differ somewhat among companies as pointed out and sometimes subtle differences as some show above...
Now the Miller Bros is indeed interesting as pointed out above and Kevin had some nice examples (btw - I have the same MB hunter

with propeller shield) - so last night I started thinking about this again and looking through some old knife photos as Miller Bros needed some attention... I am starting to think myself that it may very well be Miller Bros though NYK is so very close (and Ulster had a shield that was indeed very close as well but perhaps more pointed at ends) and Empire is coming up on the outside lane and closing

... I took some photos of another Miller Bros Jumbo Jack - indeed as pointed out above by Kevin the shield is an exact match, there is a match strike long pull and if I am not mistaken the pen blade even has a similar look based on shape and nail nick (but really tough to say as many pen blades among companies are very similar)... I also think though the master is a spear blade the swedge does indicate some similarities to that swedge seen on the M&G... Now take a look at this Miller Bros and see what you think - I am now starting to lean towards it being Miller Bros as well

... (I am including the M&G again for a quick comparison...)... Thanks all for helping trying to figure this out

)...
Cheers
Lee