There are different Muschart Heraldry Collections.
One on microfilm of index cards which contain arms description, sometime the arms bearer information, and where the arms had been seen reference notes. This is located in The Hague, and must be photocopied at the Central Bureau of Genealogie. (website CBG.nl)
The Second which contains additional family information is located at the Bureau of Heraldry in South Africa.
In The Hague here is microfilm code# and partial arms description in dutch for Mepsche.
Codering(en) volgens Muschart bij de naam Mepsche, de
1R: Gedeeld: 1 gevierendeeld (in 4 of 6 kwartieren)
68C: Eeen boom-stam