Ok guys, here are my different versions of Tru-Fit and/or Lectrolite.
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1. Oval/round shank, probable plain steel finish, no raised or depressed panels, markings are stamped; Front stamps: "D 2628 Tru-Fit" Reverse Stamps: "13/16 Chrome Vanadium Steel 7/8" --- I believe this to be VERY early Lectrolite or possibly Milwaukee Tool & Forge
2. Hex Shank (6 sided), probable CAD type finish, Single depressed panels on each side in the center of the shank, markings are forged in panels; Front marks: "15/16 Tru-Fit 1" Reverse marks: "Made In Tru-Fit 3006 USA" --- This appears to be the most common design, at least in my collection.
3. More square shank although the corners are slightly shaved but much less pronounced than #2, chrome/nickel finish, Single depressed panels on each side in the center of the shank, markings are forged in panels; Front marks: "15/16 Tru-Fit 1" Reverse marks: "Made In Tru-Fit 3006 USA" --- Less common in my examples, much larger forged in marks than #2
4. Hex Shank (6 sided), unsure of finish, single depressed panel on one side only - opposite side is flat, markings are forged in panel; Front marks: "3/4 LECTROLITE CORP. DEFIANCE O 25/32" --- I believe this to be the earliest ('32-34) Lectrolite wrenches
5. Hex Shank (6 sided), probable chrome/nickel type finish, Single depressed panels on each side in the center of the shank, markings are forged in panels; Front marks: "3/8 LECTROLITE CORP. DEFIANCE O 7/16" Reverse marks: "C CHROME VANADIUM STEEL 3001" --- I believe this is the predecessor to style #2 and followed style #4
6. Square shank with all edges rounded off, probable chrome finish, Single depressed panels on each side in the center of the shank, markings are forged in panels; Front stamps include a forged in date code in the left edge of the depressed panel which appears to be a B or 3 over "5-9," then "Forged Tru-Fit USA" Reverse marks: "5/8 LECTROLITE 11/16" --- unsure where this falls
7. Hex shank (6 sided), appears to be plain steel finish (well worn wrench), single raised panels in the center of the shank on both sides with stamped markings, and forged marks outside the raised panel on each side; Front marks: "MADE IN" (forged outside panel) "LECTROLITE" (stamped inside panel) "U.S.A." (forged outside other end of panel) Reverse marks: "3/4" (forged outside panel) "TRU-FIT 3004" (stamped in raised panel) "25/32" (forged outside other end of panel). --- there appears to be a "3" stamped in both sides, in the panel. Unknown if this is perhaps a date code or owner's marks. Unknown where this falls in production timeline.
8. Square shank with edges rounded off, probable chrome finish, 2 depressed and 1 raised panel on each side; Front marks: first depressed panel "1/2" (forged), center raised panel "4002 Tru-Fit" (stamped), 2nd depressed panel "9/16" (forged) Reverse marks: first depressed panel "MADE IN" (forged), center raised panel "LECTROLITE" (stamped), 2nd depressed panel "U. S. A." (forged) --- probably the rarest variant as this is the only one I've seen. Unknown position in timeline.
9. Square shank with edges rounded off, probable chrome/nickel finish, single depressed panel on each side with forged markings; Front marks: "7/8 FORGED STEEL 13/16" Reverse marks: "E MADE TRU-FIT IN U.S.A." --- the "E" on the reverse is forged parallel to the shank. Probably fits somewhere near #3 in the timeline.