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SAY 9 OUT OF 10 OPERA TORS!
Nation-Wide Lock Survey Proves That Duo Locks
Provide Every Feature 9 out of 10 Operators Want!
M
aking a lock that’s got everything 9 out of 10 operators want might be ex
pected to satisfy any lock manufacturer. But not the Illinois Lock Company.
For coincident with the release of the results of a questionnaire to 3,000 operators,
Illinois Lock announces a superb NEW lock!
Check the Duo Lock features that will give you perfect protection in all
normal locations.
Then see the super-safety features of the new Super-Duo— -
the lock for the one operator in ten — the lock for your most troublesome
locations!
ONLY THE DUO C O M B IN ES ALL T H E S E FEATURES THAT OPERATORS WANT!
1. MASTER KEY SYSTEM — One key convenience and
safety with the famous Registered Key Plan.
4. 14 TUMBLER CYLINDER MECHANISM— Not 7— not
11 — but 14 tumblers employed in the Duo
mechanism!
2. NON-DUPLICATABLE KEY— The Duo key serratures
cannot be duplicated on standard duplicating
machines and blanks are not sold.
5. STURDY, CONVENTIONAL • TYPE. FLAT KEY — Easy
to carry.
6. STRONG LOCK WASHER AND CAM BOLT — Plenty
3. PICK-PROOF CONSTRUCTION— No
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more nearly pick-proof than the Duo!
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----------------------
Get ALL The Facts - And A FREE Registered Key!
If you now have a Registered Key for Standard Duo
Locks, you won’t need a new key for the Super-D uo
— but you will want prices. If you don t have a
Registered Key, write for it and Super-D uo pi ices,
too. This one non-duplicatable key, registered in
our vault in your name, will operate all the Duo and
Super-D uo locks you buy in the future. There s no
cost or obligation. So write today! Address Dept. A o .
ILLINOIS LOLK
C O M P A N Y
737 West Jackson Blvd.
© International Arcade Museum
Chicago, Illinois
http://www.arcade-museum.com/