JP Koning writes:

American-German barter-centers in Frankfurt (Main) and Berlin
Generally, the Tausch-centers were supposed to be used by Germans only. The USadministration OMGUS set up a barter-center in Berlin, and its regional division inHesse launched one in Frankfurt. A third center existed in Munich (Bratter, 1947, p. 42;Davis, 1967, p. 153), who mentions one in Heidelberg). These institutions facilitatedbartering between Germans and Americans. According to Davis (1967, p. 153), they"were organized according to carefully drawn theater directives". An outline of the"Establishment of OMGUS Barter Center" that was opened in Berlin on August 10, 1946,confirms this impression.

This original design was based on the German model. Allitems were to be obtained from legitimate sources, transactions were supposed to beproperly recorded and German experts were hired to appraise prices as prescribed bythe Price Control Authority (Office of the Headquarters Commandant, 1946). Thispossibility to effectuate transactions between Germans and Americans became quitepopular in Berlin, as well as in Frankfurt. The latter swap-shop employed more than 100people. The Bremen newspaper Weser-Kurier(1947) described it as the "shop of a thousand wishes". There was a wide range in termsof both scope and quality of goods. Germans offered valuable used goods and received in return, among other things, durable packaged food or soap. Davis (1967, p. 153)describes how mail-order companies in the USA quickly reacted to the new demand bymilitary personnel in Germany, and forwarded coffee, sugar, clothing items, etc.,"usually in packages of ten cartons". In return, Americans got, for instance, Meißenporcelain or a camera - Leicas, in particular, were high in demand (Der Spiegel, 1947). Tocope with the demand, price-fixing departed from the standard used in Tausch-centersand tokens were used to simplify trading.

This success was also due to the fact that Americans could also sell cigarettes at thesebarter-centers. Because cigarettes had become the major currency on the black market,this was subject to controversial discussions within the US military administration. Theissue was also debated by high-profile leaders of the US forces.

Many Germans were quite discontented with these barter-centers. An activist of theTausch-ring movement in Wuerttemberg-Baden commented critically that theyrepresented "the selling off of German bourgeois affluence and the last residues ofownership to America" (Anon, 1946, "Besichtigung der amerikanischen Tauschzentralein Frankfurt"). This view was shared by some Americans. In a magazine articlepublished in June 1947, Bratter (1947, p. 42) writes that "the Barter Center has failed asan attack on the black market. Rather it fed the black market". He justifies this with theclose parity of values at the barter-center and the black market. "On the black market, 25cartons of cigarettes will buy a Leica camera; at the Barter Center, 23 cartons"

To read the complete paper (login required), see:
The Tausch-centers of the 1940s: closed markets as an alternative to the black economy(https://www.emerald.com/insight/content/doi/10.1108/JHRM-04-2014-0012/full/html)

Loren Gatch writes:

If they did not end the black market, the Berlin and Frankfurt BarterMarts did bring some transactions out into the open and placed some limits onthe exploitation of the civilian population. At the very least, the setup of the BarterMarts brought both legality, and perhaps a little dignity, to the black market experience. Of the two, the Frankfurt store became the more important one because ofits location in the western sector. Housed in a vacant store space at Kaiserstraße48-50 (at the corner of Weserstraße) a few blocks from the train station, theFrankfurt Barter Mart operated on two floors. German civilians, who formed longlines outside beginning early in the morning, brought their heirlooms andantiques up to the second floor. There, a team of German appraisers, supervisedby American officers, assigned points to each item. These points converted intopaper BUTEs that the Germans could use to purchase vital commodities, deposited by the Americans, on the first floor.

BUTE prices at the Frankfurt Barter Mart could not be substantially outof line with the black market generally, since too great of a divergence woulddrive barter transactions off the premises. In any event, daily turnover was as highas 85%, and the store quickly became the major shopping center in the Americanand British zones. Special trains were even engaged during the holiday season tobring eager Germans to Frankfurt for shopping at the Barter Mart. The valuationof the items was left to German appraisers, who assigned a value in BUTEs towhatever item their countrymen brought in. Naturally, the suspicion arose thatGerman appraisers favored their own against the Americans. Yet, in this fantasticworld where a single carton of cigarettes bartered for many times the weekly wageof a German worker, it would have been hard to object to any particular valuation.Beyond providing some regularity to black market pricing, both Barter Martsserved the important purpose of physically separating the Americans and theGermans. Nonetheless, the American authorities were sensitive to the perceptionthat the Barter Marts amounted to official recognition of exploitation by a conquering power, and looked forward to their closure.

In early January 1948, Clay announced the Berlin and Frankfurt bartercenters would accept no more goods after April 1, and would close on the first ofMay. Outstanding scrip would become valueless at that time. The inventories inboth locations were liquidated in a vast close-out sale that brought out to theFrankfurt location alone 2,500 customers, mostly army wives, who cleaned outmost of the remaining inventory in exchange for military scrip rated at 5 cents aBUTE. Proceeds from these sales, and from a final lottery to dispose of remainders, amounted to some $38,000 and was turned over to the German YouthActivities group.

One series is known for the OMGUS Barter Center in Berlin, in thedenominations of 1-, 5-, 10-, 25-, 50-, and 100-"Barter Units" (though Schwanand Boling report only the 1- and 5- denominations extant (SB nos. 601-606).

Four main varieties of "Barter Unit Certificates" (BUTEs) were printedfor the Headquarters Command Barter Center in Frankfurt. The first variety consisted of the series of 1946 and 1947 and differed only by the date, and the color ofthe 50-BUTE note (SB nos. 611-622). These also appeared in denominations of 1,5-, 10-, 25-, 50- and 100-BUTEs.

To read the earlier E-Sylum article, see:
U.S. POST-WWII GERMANY BARTER UNIT CERTIFICATES(https://www.coinbooks.org/v23/esylum_v23n50a30.html)