Interesting Old Steel Machinist Square ? ~ Unmarked Any Idea of Maker

[junk250]

I'm Back 

Today's find,

Really interesting all steel "Machinist Square"  ?

The item is not marked with a maker mark that I can find.

It measures approx. 17" x 8", Extremely well made and has decorative diamond patterns(goes thru to both sides) that are made with alternating brass and copper pins.

It has a total of 33 dowels in it, 24 decorative brass/copper pins and another 9 steel pins holding the base together, 5 large pins in the corner, two in the middle and two more on the end.

It appears the base is made from 2 pieces of steel and pinned together(with 33 dowels).

The fitment is so accurate the pins are almost invisible.

There is a little slot through the base, whats that for ?

It is pretty heavy, all steel, weighs maybe 4 or 5 lbs.

Any information would be appreciated.

It looks pretty old to me, turn of the century maybe older .

Thanks for the Awesome forum !

Nice right ?

[gibsontool]

Looks very nice. It seems to have a custom made look to it. Hard to make out the slot in the base, could it be to slide in another square to make parallel lines for some specific job ?

[turnnut]

wasn't there another post that said it was for holding up on longer pieces by putting in the attachment
when needed ???

[Twilight Fenrir]

Looks very nice. It seems to have a custom made look to it. Hard to make out the slot in the base, could it be to slide in another square to make parallel lines for some specific job ?

I'm not 100%, but I believe I have a nearly identical, but smaller one in a big box of old tools I picked up a while ago... I'll go digging for it when I get a chance...

I think the slot would be used for an anlge finder to pass through it... But that's just speculation.

[gibsontool]

Twillight, If you dig out the one you have it would be interesting to know if it would fit into the slot on the one that junk250 has.

[leg17]

wasn't there another post that said it was for holding up on longer pieces by putting in the attachment
when needed ???

I believe you are not mis-remembering.

[junk250]

Thanks for the replies.

I know it's hard to tell much with the crappy pics, but I was exited to show it.

I'll try to get some better pics up soon showing more detail .

It seems like a manufacturer would have put a maker mark on it, whoever made it was very skilled I'll say that much.

Any guess on the age?

[Twilight Fenrir]

Twillight, If you dig out the one you have it would be interesting to know if it would fit into the slot on the one that junk250 has.

Nope, I was remembering wrong... I do have one with brass dowels, but the fat part is made of wood, and the pins run through this.... Goofy tri-lobal shaped thing... I'll have to take a picture... It's fancy, but not as fancy as the OPs