Automatic Age

Issue: 1941 February

DUO LOCK BATS 9 00 IN
3,000 Questionnaires Mailed to
Operators — Results Prove Duo
Locks Offer Every Feature 9 out
of 10 Operators Want!
ONLY THE
ALL THESE
DUO COMBINES
FEATURES THAT
OPERATORS WANT!
1. MASTER KEY S Y S T E M -O n e key
convenience and safety with the fa­
mous Registered Key Plan.
2. N O N -D U P L IC A T A B LE KEY— The
D uo key serratures cannot he d u p li­
cated on standard duplicating m a­
chines and blanks are not sold.
3. PICK-PROOF C O N S T R U C T I O N
— No lock made is more nearly pick-
proof than the D uo!
4. 14 TUM BLER CYLIN D ER M E C H ­
A N IS M — Not 7 — not 11 — but 14
tum blers employed in the D uo mech­
anism !
5. S T U R D Y ,C O N V E N T IO N A L -T Y P E ,
FLAT KEY -Easy to carry.
6. STRONG LOCK W ASHER A N D
C A M -B O L T — Plenty of resistance to
prying or forcing for all norm al lo­
cations.
THE
7
T
h a n k
y o u
,
o pera t o rs
!
Thank you for
your cooperation in helping us deter­
mine the lock features you judge most im­
portant. Thank you for your overwhelming
endorsement of all the features that only
the Duo Lock combines.
Actually 3,000 operators were asked to
name the lock qualities they wanted.
In 9
cases out of 10. no feature was asked for
that the Duo Lock doesn’t already provide.
Here is dramatic proof of Duo leadership!
But the Illinois Lock testing and research,
the constant effort for still better products,
has been going steadily on.
Now to meet
the unusual needs of the one operator in
ten— to insure super-safety for even the
most troublesome locations— we present a
NEW loch. A truly superb instrument.
A
lock that offers safety features unheard of
only six months ago! Read about them at
right.
ILLINOIS
7 3 7 W. Jackson Blvd.
© International Arcade Museum
http://www.arcade-museum.com/
NATION-WIDE LOCK SURVEY!
And Now a NEW Lock-For the ONE Operator in TEN
-F o r the Most TROUBLESOME Locations
THE NEW
SUPER DUO
All the Standard Duo Qualities Plus
4 Sl/PEft-SAFETY FEATURES!
1. Extra strong, extra heavy lock washer and holts
to make twisting impossible.
2. A 25% stronger cam-bolt to make forcing or
prying impossible.
3. All b rass, chromium plated, rust-proof cylinder
with hardened-steel, drill-proof insert.
4. Strongest key on the market— made of Nickel
Silver— only Superman could twist or break it!
Inside and out— from its rust-proof brass cyl­
inder to its tarnish-proof chrome finish— the
Super-Duo is designed and built to give you
more safety for more years than any other
lock!
Naturally, it costs more.
For ordinary pur­
poses, you probably won’t need the super-safety
it provides. But when you do need the finest
protection money can buy, the Super-Duo is
your lock. It gives you all the proved protection
of the Standard Duo— plus the 4 super-safety
features described above!
W RITE FOR COMPLETE IN F O R M A T IO N — A N D A FREE REGISTERED KEY!
If vou now have a Registered Key for Standard
uo Locks, you won’t need a new key for the
u per-Duo— but you will want prices. If you
° n t have a Registered Key, write for it and
“ llPer-Duo prices, too. This one non-duplicable
key, registered in our vault in your name,
will operate a ll the Duo and Super-Duo
locks you buy in the future. There is no cost or
obligation to buy locks now or later. So write
today, Address Dept. A-2.
COMPANY
Chicago, Illinois
© International Arcade Museum
http://www.arcade-museum.com/

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