The 1920s is certainly feasible -- Pritzlaff Hardware was incorporated
in 1884 and last appeared in the Milwaukee business directory in 1958.
 UW Milwaukee has an archive of their papers which I could probably
get access to.

Any distinguishing marks on the plane that might help identify it as
being made by Ohio Tools?  The only mark I've found so far is an "S"
on the back on the lever cap.  The adjuster  seems a bit different
than I'm used -- the yoke is a heavy casting, not bent metal, and the
lateral lever has a bigger disk on the end, I think.  I need to dig up
my Stanley #5 and take some pictures, I guess.

On 5/27/06, Anthony Seo  wrote:
> I'm not familiar with that particular brand or Hardware outfit, do
> you have any working dates?  My thoughts with tapered iron, if it is
> original,  that the plane was made by Ohio Tools.  They were still in
> business until 1920 so depending on the dates that is a possibility

>From the UWM web page on their business papers:

http://www.uwm.edu/Libraries/arch/findaids/msscq.htm

ADMINISTRATIVE HISTORY: The John Pritzlaff Hardware Company was
founded in 1850 by John Pritzlaff (1820-1900), in Milwaukee,
Wisconsin. John Pritzlaff was born in 1820 in Trutzlatz, a province of
Pomerania, Prussia. He emigrated to America in 1839 and worked his way
westward by maintaining various jobs along the way, such as, a laborer
on the Genesee Canal in Pennsylvania. By 1841 he reached Milwaukee and
became a teamster for $9.00 a month. In 1842 he was a cook on a lake
steamer and the following year supported himself by cutting timber at
the site of Schlitz Park. In 1843 he entered the hardware field where
he was employed by Shepardson and Farwell as a porter, earning $200 a
year. The following year Shepardson sold out to Nazro and King and Mr.
Pritzlaff continued in the latter's employment. He remained with Nazro
and Company until 1850.

In the year 1850, John Pritzlaff, along with August F. Suelflohn and
Henry J. Nazro, opened a small retail hardware store called John
Pritzlaff and Company. Nazro was a silent partner, but carried the
financial burden. In 1853 Suelflohn was bought out by Pritzlaff and in
1866 Nazro withdrew, leaving the entire business with John Pritzlaff
as proprietor of a large and rapidly growing business. By 1884
Pritzlaff incorporated the John Pritzlaff Hardware Company. The
company kept growing and moving until it became the largest hardware
store in Milwaukee and the entire region. When John Pritzlaff died in
1900, his son, Frederick C. Pritzlaff, took over the company. The John
Pritzlaff Hardware Company appears in the Milwaukee City Directory for
the last time in 1958.

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