Came in a heap of stuff, now I need to find the straight edge that goes with it

Cool, thanks for rhe info.

And utterly useless, and I'll dispose of it for you so it doesn't clutter up the shop, just let me know and I'll send you my address 

Neat find.

^ 45spaces is most likely your best source for identifying old tractor/implement/machinery wrenches. 
There have been no shortage of "Champion" manufacturers and brands:


Champion / Champion thread at GarageJournal.com https://www.garagejournal.com/forum/threads/champion-wrench.491400/ /

Champion / Champion adjustable wrench see Girard / "Champion" forged into handle /

Champion / Champion adjustable wrench see Losee Wrench Works / patent 864659 Aug 27 1907 Jesse A. Losee /

Champion / Champion adjustable wrench see Whitman & Barnes / erroneously marked "PAT. FEBY. 23.83 CHAMPION" / actual patent date is Feb 27 1883 patent 273170 Frederick H. Seymour /

Champion / Champion-Arrowhead, 5147 Alhambra Ave., Los Angeles, CA 90032 / sprinkler and irrigation wrenches /

Champion / Champion bench grinder see American Grinder Mfg. Co., Milwaukee, WI /

Champion / Champion blow torch see Lenk Mfg. Co., Boston, MA /

Champion / Champion Blower & Forge Co., Lancaster, PA / taps, dies, screw plates, vise / "Electric" screw plates / patent 979073 Dec 20 1910 & 1170072 Feb 1 1916 Henry Brinser Keiper / http://vintagemachinery.org/mfgindex/imagedetail.aspx?id=2867 / https://www.datamp.org/patents/search/xrefCompany.php?id=784 / https://www.garagejournal.com/forum/threads/help-identifying-old-champion-forge-post-drill.506866/ /

Champion / Champion Brass see Champion Arrowhead /

Champion / Champion carriage wrench see Goodell Co. (Goodell Bros., Goodell-Pratt) /

Champion / Champion chain wrench see Greene Tweed & Co. / see patent 442569 Dec 9 1890 George W. Buffard /

Champion / Champion chain pipe wrench see Ithaca Drop Forge Co. / Bufford Chain Wrench patent 442569 Dec 9 1890 George W. Buffard /

Champion / Champion DeArment / Champion DeArment Co., Meadville, PA / est. 1886 (renamed to Champion DeArment 1924) / see also Channellock / patent D94156 Dec 25 1934 Howard H. Manning & 1371952 Mar 15 1921 Paul John Tumulla & 1950362 Mar 6 1934 Howard H. Manning / http://alloy-artifacts.org/champion-dearment-tool.html /

Champion / Champion Hardware Co., Geneva, OH / vise / patent 1211024 Jan 2 1917 Frank McGlinchy and Albert L. Wilson /

Champion / Champion hog ring pliers see Chambers Bering & Quinlan, Decatur, IL /

Champion / Champion IHC implement wrench see B.F. Avery & Sons /

Champion / Champion IHC implement wrench see E & D Co. /

Champion / Champion jar wrench see C.S.L. Co., Geneva, OH /

Champion / see Keystone Forge /

Champion / Champion "Lightning" wrench see Champion Machine & Tooling Co. / "Lightning" wrench / patent ? /

Champion / Champion Machine & Tooling Co., / no information /

Champion / Champion Mower & Reaper, Springfield, IL / implement wrench / some specimens marked 2153, 2155, 2156 with stylized Maltese Cross /

Champion / Champion Potato Co., Hammond, IN / "OK Champion" / see OK Champion /

Champion / Champion ratchet wrench see Syracuse Wrench Co. /

Champion / Champion screwdriver see Union Hardware Co., Torrington, CT /

Champion / Champion Silo Co., Des Moines, IA / see also Western Silo Co. /

Champion / Champion silo wrench see Western Silo Co. /

Champion / Champion Spark Plug Co., Toledo, OH / "Plug Master" ratchet manufactured by New Britain Machine / "Miloset" spark plug gapper / patent 2439363 Apr 6 1948 Louis A Habicht and Howard H. Vogel / https://www.garagejournal.com/forum/threads/champion-spark-plug-rachet.24974 / https://www.garagejournal.com/forum/threads/albert-champion.406071/#post-11350850 /

Champion / Champion tobacco cutter see Enterprise Mfg. Co., Philadelphia, PA /

Champion / Champion Tool Co., Meadville, PA / est. 1886 / patent 908969 Jan 5 1909 George B. DeArment / "Champion" hoof nippers, "Giant" hoof parer / renamed to Champion DeArment Co. 1924 /

Champion / Champion track drill see Handland Buck Mfg. Co., St. Louis, MO /

Champion / Champion vise see Bonney Forge & Tool Works, Allentown, PA / https://www.garagejournal.com/forum/threads/spreading-the-bonney-affliction.273680/page-140#post-10786579 /

Champion / Champion vise see Champion Blower & Forge, Lancaster, OH / swivel-base bench vise /

Champion / Champion vise see Champion Hardware Co., Geneva, OH / carpenters woodworking vise /

Champion / Champion vise see Western Tool & Mfg. Co., Springfield, OH

Champion / Champion Wrench Mfg. Co., 928 W. Huron, Chicago, IL / patent 1371952 Mar 15 1921 Paul John Tumulla / renamed to Champion DeArment /

Champion * / see also notes below re: Champion /

re: Champion (notes by twertsy)

A. G. Coes & Co. Worchester, MA (Made for Champion Mower & Reaper Co.)
L. Coes & Co. Worchester, MA (Made for Champion Mower & Reaper Co.)
J. Asbury (Birmingham, England) patented 12/22/1869: (GB patent: GB-186903709) http://www.datamp.org/patents/advance.php?pn=186903709&id=53001&set=3
Champion Mower & Reaper Co. (Springfield, IL) // Also made by Whitely, Fassler and Kelly prior to forming the former company
W & B Co. Marked "Champion W&B Co. Pat FEBY 23, 83" (?) (patent 273170)
Champion Mfg. Co.
William M. Whitely Co. // Whitely Reaper Works Springfield, OH (wrench for adjusting reapers, marked CHAMPION) (Eventually were consumed by IHC)

disambiguation on "Champion": https://www.garagejournal.com/forum/threads/champion-wrench.491400/#post-9704171

Empire / Empire Mdsg. Co., 140 Marbledale Rd., Tuckahoe, NY / importer of "SLIK" adjustable wrench / see Macdowell Equipment Co. Ltd., Romford, England /

Macdowell / Macdowell Equipment Co. Ltd., Romford, Essex, England / "Slik" adjustable wrench / patent GB 650363 Oct 29 1948 Charles Wilson Macdowell /

that same design was manufactured in Germany by a company that stamped it "SUL":

Schmidt / Fr. Paul Schmidt, 20 Herrenstrasse, Suhl, Thuringia, Germany / "SUL" wrench / patent DE 342600 Oct 20 1921 and patent GB 169675 Dec 1 1921 / https://www.datamp.org/patents/displayPatent.php?number=342600&typeCode=0&country=DE /

There was a U.S. manufacturer as well:

U.S. Wrench / U.S. Wrench Co., Philadelphia, PA / "Bohn Quickfit" wrench / patent 1481250 Jan 22 1924 George J. Bohn and Fred W. Werner /

Interesting design. I have one or two of those here in my bicycle wrench collection.