Diificult to distinguish, since most atoms nr. 3 are close to each other. I have tested with another file and yes, it is selecting atoms in any model that are close to specified atom in any model (i.e, not only within the same model).
Test attached PDB file using atomno=22 as the reference · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Dr. Angel Herraez Dep. Bioquimica y Biologia Molecular, Universidad de Alcala E-28871 Alcala de Henares (Madrid), Spain fax: +34-91 885 45 85
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File: glyser_doble.pdb
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