I just bought a #4 hand plane.  The hand plane has No 4 on the toe but has no other markings on the body.  the blade has Auburn Tool Co on it and underneath it has a thistle and underneath that the word ” thistle”.  On the bottom of the frog there is the # 1087 I have done a little research online and found some information on Auburn tool co in Auburn NY.  The planes that I saw on these websites were wooden body planes.  My question is does anyone know if Auburn Tool co made Metal bodied planes or could it be that the Iron is from an old wooden body plane made by Auburn tool.  The reason I say this is b/c on the back of the blade it looks like someone has tapped the blade to adjust it.  I only paid 12.95 so if the blade is from another plane It will not break me.  Any information on this would be greatly appreciated.  Thanks