THIS IS A VERY OLD PLASTIC CONCRETE CALCULATOR FROM BOSTON SAND AND GRAVEL COMPANY.  IT HAS BEEN IN OUR OFFICE FOR MANY YEARS IN A FILE CABINET AND WE JUST RAN ACROSS IT EHILE MOVING.

GREAT VINTAGE ITEM FOR THE BOSTON SAND AND GRAVEL CO. COLLECTOR. HOPE SOMEONE WILL ENJOY IT.

LOOKS LIKE IT HAS BEEN USED SOMEWHAT BUT IT IS STILL IN GOOD CONDITION.  ALL NUMERS AND LINES ARE PERFECTLY CLEAR.  THIS ITEM CAN STILL BE USED.

HAS INSTRUCTIONS UNDER THE SLIDE AS SHOWN IN PHOTOS.

PLEASE NOTE THE TELEPHONE NUMBERS ON THE BACK OF THE ITEM.  THEY HAVE THE OLD TWO LETTER PREFIXES WHICH DATES IT BETWEEN THE 1930S AND THE 1960S.

PLEASE EMAIL ANY QUESTIONS.

THANKS.