J. D. MacKenzie & Co.
Electric lighting engineers
J. D. MacKenzie & Co. (probably the 'D. MacKenzie & Co.' referred to in the Honeyman, Keppie & Mackintosh job-book entry for Scotland Street Public School) are listed for the first time in the 1902–3 Glasgow Post Office Directory as electrical engineers. 1
Notes:
1: Glasgow Post Office Directory, 1902–3.