Iver Johnson Champion Exploded Views

Iver Johnson Champion
Single Barrel Shotgun
(This gun could also be identified by the name EXCEL, made for Montgomery Wards)

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The above illustration taken from an original Iver Johnson catalog dating about 1950, with part names converted to actual part numbers

527	Sight, Front (threaded)	503	Firing Pin
531-12	Extractor (12ga)	504	Firing Pin Spring
531-16	Extractor (16ga)	505	Firing Pin Stop Screw
531-20	Extractor (20ga)	506	Top Lever
531-28	Extractor (28ga)	507	Top Lever Yoke
531-410	Extractor (410)	508	Top Lever Yoke Screw
532	Extractor Spring	509	Locking Bolt
533	Extractor Stop Pin	510	Locking Bolt Pin
535	Extractor Lever	511	Locking Bolt Spring
541	Joint Pin	512	Locking Bolt Spring Screw
545	Fore-end Complete (walnut)	513	Locking Bolt Connecting Rod
548	Fore-end Wood (walnut)	514	Hammer
551	Fore-end Iron	515	Hammer Pin
552	Fore-end Iron Screw (2 required)	516	Main Spring
553	Fore-end Iron Snap Plate	517	Main Spring tension Adjustment Bar
555	Fore-end Snap Plate Screw (2 required)	518	Main Spring Plunger
556	Fore-end Plunger	519	Main Spring Plunger Pin
557	Fore-end Plunger Pin	520	Trigger
558	Fore-end Plunger Pin Spring	521	Trigger Pin
559	Stock, Butt Complete (walnut)	522	Trigger Spring
562	Stock, Butt Wood only (walnut)	523	Trigger Spring Screw
565	Stock, Butt Screw (2 required)	524	Trigger Guard
566	Stock, Butt Screw Washer	525	Trigger Guard Screw
567	Butt Plate	526	Barrel, (specify ga. & length)
568	Butt Plate Screw (2 required)	.	.

Here we see the chamber, locking lug & extractor/ejector	Here we see an exploded view as seen in the photo on the left