Source: http://cisgw3.law.pace.edu/cases/950308g2.html
Timestamp: 2019-04-18 11:00:01+00:00

Document:
Plaintiff [Seller] operates a shoe manufacturing business and has its seat in (...), Italy. It demands from Defendant [Buyer], who owns a retail outlet for shoes, payment of the purchase price for the delivery of 346 pairs of shoes. The sum claimed by [Seller] is Italian Lira [Lit.] 25,026,000. The parties had determined that the net purchase price should be paid within 60 days after the issuance of the invoice.
On 6 October 1994, [Buyer] acknowledged a voluntary return a part of the delivered goods (value Lit. 15,213,500), meaning that a balance of Lit. 9,818,500 remains. This sum has been claimed by [Seller] with its present action.
[Seller] requests the Court to order [Buyer] to pay Lit. 9,818,500 plus 16.5% interest on Lit. 25,026,000 from 13 September 1994 until 7 October 1994 and on Lit. 9,818,500 since 8 October 1994.
[Buyer] asserts that [Seller]'s submissions are not conclusive and further contests the interest claim on both its merits and its amount.
The admissible action is founded.
Since [Buyer] is domiciled within the district of the Petty District Court Wangen, the Court has both international and territorial jurisdiction to consider this action, cf. Art. 2 Brussels Convention on Jurisdiction and the Enforcement of Judgments in Civil and Commercial Matters.
The United Nations Convention on Contracts for the International Sale of Goods governs the contractual relationship between the parties. The parties have not made a choice of the applicable law in accordance with Art. 27 EGBGB [*], to the effect that, in the absence of such choice of law, the contract will be governed under Art. 28 EGBGB by the law of that State to which the contract is most closely connected. Art. 1 CISG provides that the Convention applies to these cases, unless the respective State has declared a reservation.
Under these circumstances, it may remain undecided to which State (Italy or Germany) the contract bears the closest connection. If it were Italy, Italian law would apply. If it were Germany, German law would apply. However, both are Contracting States to the CISG and -- to the knowledge of the Court -- have not declared a reservation.
[Buyer]'s obligation to pay the purchase price follows from Art. 53 CISG, the obligation to pay interest is based on Art. 78 CISG.
In that respect, in order to claim 10% interest it is sufficient to submit that a bank loan in this amount has been used, because such interest rates are usual for loans which are not secured by immovable property.
However, if a creditor claims additional interest on the basis of Art. 74 CISG, it must at least submit that it was impossible to achieve a less expensive bank loan. If the creditor does not attempt to get a cheaper loan at market rates, it will be precluded from its argument that it suffered additional losses.

References: Art. 2
 Art. 27
 Art. 28
 Art. 1
 Art. 53
 Art. 78
 Art. 74