SAN FRANCISCO CABLE CAR CABLE. KEY RING HANDCRAFTED BY SAN FRACISCO CRAFTSMEN. TO WHOM IT MAY CONCERN. THIS CERTIFIES THAT SEGMENTS OF WORM CABLE USED BY Mr. IN FASHIONING HIS METAL CREATIONS WERE CUT FROM CABLE USED IN THE SAN FRANCISCO MUNICIPAL RAILWAYS CABLE CAR SYSTEM. CITY AND COUNTY OF SAN FRANCISCO.