Vintage Gilbert No. 5 1/2 Motorized Erector Set

Vintage Gilbert No.5 1/5  motorized Erector Set. This set comes in it's original metal box, with original instructions (which are often lost). It appears to be complete, including the motor. It's metal box does have a minor bit of rust on one corner, not rusted through. See pictures for best description. I would date this from at least the 1950's.  It is in good pre-owned condition.  A great hands own learning experience that's not electronic. Feel free to ask questions. I don't respond to insulting low ball offers. And as always THANKS for looking!