Although the Standard Catalog of World Coins states that KM#13a is made of nickel plated steel, no magnetic coins were identified. This questions the statement of composition, although not all steel is magnetic. Muntalmanak doesn't mention a change in composition after 1987, but isn't sure about its source (personal communication). All considering it seems likely that there is no change in composition and that there shouldn't be a difference between KM#13 and KM#13a.
2.0 g. Nikeliu dengtas plienas / Nickel Plated Steel, 16 mm. Stovis AUNC Monetos pavyzdžio nuotrauka iš interneto Pirkėjai, negalintys atsiimti prekės Vilniuje, apmoka siuntimo išlaidas.