Neat antique building block set. I don't know exact age, but looks to be 1940's or 1950's if not older to me. Missing some pieces. The box is cracked on the cover, held together with masking tape.
The longest blocks are about 8" long and are a little less then 3/4"x3/4". The longer arch is just over 4" long and 1 1/4" tall.
The carrying box is about 13.5"x8.75"x2". Weighs about 4 pounds.