49, Regent Quay, Aberdeen
Peter McMillan is recorded as a Clock and Watchmaker, and Nautical Instrument Maker, located at 49, Regent Quay, Aberdeen, in 1837.
Source: Pigot and Co.'s National Commercial Directory of Scotland - James Pigot - 1837
Peter McMillan was recorded as having served his apprenticeship under John Garty. The apprenticeship was registered in 1821 and McMillan was admitted into the Aberdeen Hammermen in 1829. The last mention of Peter McMillan appears to be in 1852.
Source: The Goldsmiths of Aberdeen 1450-1850 - Dr. I.E. James - 1981