Complex sentence: The crown jewel of the 32 surviving "Small One Dollar" stamps is the block of four, originally owned by R. A. de Villard who took it directly from the customs where he worked.
Split into simpler sentences: The crown jewel of the 32 surviving "small one dollar" stamps is the block of four. It was originally owned by R. A. de Villard who took it directly from the customs where he worked.