Very small Hallmark on chain

[ldmorrill]

Need help identifying very small hallmark on silver chain. The photo is magnified 60X This item was brought back from germany after WW2 The only mark I can make out is the letter A Any help will be greatly appreciated

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http://sv1.letmehost.com/img.php?file=s ... M1_002.jpg" onclick="window.open(this.href);return false;