This is a slowly evolving but fascinating journey through Takumar history/archaeology.
The Takumar Field Guide will be at it's centre.
The little manual Takumars, 4/35mm and 11/18mm are near final, but will never be complete.
Others such as the Auto-Takumar 3.5/135 are close behind.
This is an evidence-based site and more data is always best in any research.
Serial numbers arranged into successive batches are a critical background for this historical research.
In the meantime my own Collection is nearing completion serving as a guide for those looking ahead.
Takumarology will serve collectors, repairers and second hand dealers, principally. Photographers will find detailed knowledge not easily found elsewhere.
While you're here, please share what you may. It is a worthwhile journey. I welcome correction and new data.
Your comments or experiences, please.
PS.(Serial numbers of early lenses that better define batches and numbers produced are gold. I have a private SN database to interrogate if you have a question to answer.)