Due to construction works on the Alphen aan den Rijn station tunnel, train series 9500 (Alphen aan den Rijn - Gouda) was run with SGMm or Mat '64 EMUs instead of the usual A32 trams between 13th July and 17th August 2009.
SGMm 2120 + 2123 are seen here as train 9539 (Alphen aan den Rijn - Gouda).
Alphen aan den Rijn, Thursday 6th August 2009.

Photo © Rogier Peeters (rogierpeeters@gmail.com)