„Gules, a crossed fiveparted crown Argent decorated sable, at its ends two hanging chains with a cross, all Argent.“ 
The arms were granted on November 2nd, 1964. The arms shows the crown of the holy Helena, patron saint of the Osterberg monastery. The water lily leave and the colours symbolise the belonging to the Tecklenburg county.
Alt-Lotter Wappen

Veddeler, Peter; Wappen, Siegel, Flaggen; Münster 2003; S. 171; ISBN 3-87023-252-8
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