German, Customs Seal, Ohlau

Ohlau Customs Office Seal, Image & Found by Simonthesearcher.
"It was found in Wilts,Salisbury district..Its about 19mm in diameter."

Eagle displayed // Z.A. curved downwards / *1* / OHLAU curved upwards

Information from folkert:- 'This seal is that of the customs office at Ohlau (situated in Silesia, now Poland I think). But I cannot date this seal, perhaps before WW II.'