Peter M. Piankoff was born in Irkutsk, Siberia which he left with his wife Evodika Filipoona in 1907 to run a bakery in Harbin. After a brief spell in Vladivostok in 1914-1915 the couple returned to Harbin and left Russia for good. (See https://gwulo.com/node/45369) He seems to have come to Hong Kong in or around 1924.
In 1925 Mr. Piankoff was a baker ('fancy pastry and wonderful iced confections in almond paste and marzipan') at the Lane, Crawford bakery in Wanchai. He was not the baker in charge, but he had 'assistants' so enjoyed some seniority.
He was the father of Serge Peacock and M. P. PIncott, both of whom later baked for Lane, Crawford. He and his wife were probably part of syndicate, organised by Serge, which won a large sum of money on a sweepstake in February 1940. He worked in the company's bakery at Stubbs Road during the 1941 hostilities, left for Shanghai with his wife during the occupation, and died in 1944.
'Hongkong's Modern Bakery', SCMP, March 19th, 1925, p. 9.
Note: I’m not sure of the spelling of Mr Piankoff’s middle name.