Hi,
No not imported from USSR.
Poland domestic gold hallmarks 1986-2004. In March 1986, the hallmarks underwent another revision in both fineness designation and frame shape. All gold standards were now uniformly hallmarked in rectangular frames with cut-corners. The core image of the knight in traditional Hussar helmet facing left.
The single -digit standard numbers, used from 1920 to 1986, were changed to a fineness expressed in thousandths. ;
1st standard
960,
2nd standard
750,
3rd standard
583,
4th standard
500,
5th standard
375, and
6th standard or the stork or wedding band mark
333. In this period, the assay office identification letter appears above the gold fineness to the left of the knight's head. The
P is for the city of
Poznań -
1962 to date.
In July 1996, the
3rd standard of 583 was raised to
585 to conform to the standard used by most other European countries.
In October 1997, the 585 hallmark was revised again after complains that the rectangular shape was too large to strike on small articles. The mark was physically reduced in size and reverted to a previously used elongated hexagonal frame-shape. The core image of the knight was moved to to the center of the hallmark, flanked by the standard numeral on the right and assay office letter on the left. In January 2004 to date, all the remaining gold hallmarks were changed to match the style and frame shape of the 1997 3rd standard mark. Poland domestic gold marks 1920-1931 single -digit standard numbers; 1=960, 2=750, 3=583. Poland domestic gold marks 1931-1963 single -digit standard numbers; 1=960, 2=750, 3=583 and 4=375. Poland domestic gold marks 1963-1986; 1=960, 2=750, 3=583, 4=500 and 5=375.
Peter
Source; World Hallmarks Volume I Europe 19th to 21st Centuries William B. Whetstone, Danusia V. Niklewicz, Lindy L. Matula