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Wiki information Giwelb:

Morris Giwelb
Person

Morris Giwelb was a British stamp dealer, originally from the Province of Warsaw in Russian Poland, who, in his prime, became one of the most important dealers in the great rarities of philately. He emigrated to England in 1882 and became a...

Bernhardt Assmus
Person

Dr. Bernhardt Assmus, originally from Hamburg, Germany, was a stamp forger operating in London. He was unmasked after Morris Giwelb bought forged Penny Black VR official stamps from him. Giwelb accompanied the police on a visit to Assmus' premises at...