Police Smash Coffee RingFRANKFURT, Nov. 25 lt;SS)~ More than 13,000 pounds of smuggled green coffee was seized here as Frankfurt police today announced the smashing of a giant black-market ring.Officials believe it will put a crimp in the plans of the black-market boys who were counting on their usual phristmas “boom.”The raid was made in Frankfurt’s giant Market Hall, reputedly the largest indoor market in Europe.Merchant ArrestedIn connection with the raid, police announced the arrest of Arnold Keller, 32, a merchant. Police allege that in his home they fofmd a complete list of black-market operations.With Keller’s arrest, police indicated the belief they have laid hands on the one of the last big-time black - market operators in Frankfurt.The coffee allegedly was smuggled across the West German border by truck and camouflaged with wrappings of rags and blankets, according to the police.The 94 sacks of coffee were storedfCont. on Page 12, Col. 4)