2 1/8″ high x 1 9/16″ diameter. Brass body. Brass shackle. Post key. “AUTOMOBILE INSURANCE AETNA LIFE INS. COMPANY” is stamped on the obverse of the body. “AUTOMOBILE INSURANCE AETNA LIFE INSURANCE.CO”. is stamped on the reverse of the body. “PROTECTION” is stamped on the obverse of the shackle. “B91” is stamped on the obverse of the shackle. “B91” is the key code.