This is an 8 incher, is this the smallest of this version of monkey wrench, or is there a 6 incher too?

I have a couple of 6 1/2 inch Coes patent monkey wrenches, maybe three.

HeelSpur;

according to my Bemis & Call and Coes wrenches catalog number 30.

your 8" wrench is of the Briggs patent nut wrench No. 38

they were made in the following sizes;  8"  10"   12"  15"  &  18"

8" wrenches were sold for $18.oo per dozen.

CATALOG DESCRIPTION;

This wrench has many advantages over any other wrench made, as it is provided with a long nut or sleeve whereby the whole hand can be applied in making adjustments, thus giving greatly increased power to the jaws on wornout nuts. it is especially useful in cold weather, as it can be operated with your mittens on.
the long nut protects the thread and prevents it from being damaged.

The Head, Bar and Shank of these wrenches are all one-piece steel forging.

ALSO IN THE NO. 30 CATALOG;

BRIGGS PATTERN NUT WRENCH;  #38      8"   10"  12"  15"   18"

Merrick pattern Monkey Wrench;   #37     6"  8"   10"   12 "  15"  18"  21"   24"

Steel Handle Nut Wrench;             #54     6"  8"   10"   12"   15"  18"  21"  24"

Steel Handle Monkey Wrench;       #70     6"  8"   10"   12"   15"  18"  21"  24"

COMBINATION PIPE AND NUT WRENCH;
SHORT NUT. #43       8"  10"  12"   15"  18"
LONG NUT.   #45       8"  10"  12"   15"  18"

steel handle screw wrench no. 60;    6, 8, 10, 12, 15, 18 & 21 inches
wood handle screw wrench no. 62;   6, 8, 10, 12, 15, 18, & 21 inches

Coes knife handle wrench; 1st produced in 1841;  6, 8, 10, 12, 15, 18 & 21 inches
Coes steel handle;  6, 8, 10, 12, 15, 18, & 21 inches

Coes Key Model;   28"   36"  &  48"

NOTE; this catalog is from after Bemis & Call took over the Coes line of wrenches and does not mention any
special order for a Key Model sized above 48"  ??????     

Quote from: turnnut on August 04, 2015, 01:53:38 PM
ALSO IN THE NO. 30 CATALOG;

BRIGGS PATTERN NUT WRENCH;  #38      8"   10"  12"  15"   18"

Merrick pattern Monkey Wrench;   #37     6"  8"   10"   12 "  15"  18"  21"   24"

Steel Handle Nut Wrench;             #54     6"  8"   10"   12"   15"  18"  21"  24"

Steel Handle Monkey Wrench;       #70     6"  8"   10"   12"   15"  18"  21"  24"

COMBINATION PIPE AND NUT WRENCH;
SHORT NUT. #43       8"  10"  12"   15"  18"
LONG NUT.   #45       8"  10"  12"   15"  18"

steel handle screw wrench no. 60;    6, 8, 10, 12, 15, 18 & 21 inches
wood handle screw wrench no. 62;   6, 8, 10, 12, 15, 18, & 21 inches

Coes knife handle wrench; 1st produced in 1841;  6, 8, 10, 12, 15, 18 & 21 inches
Coes steel handle;  6, 8, 10, 12, 15, 18, & 21 inches

Coes Key Model;   28"   36"  &  48"

NOTE; this catalog is from after Bemis & Call took over the Coes line of wrenches and does not mention any
special order for a Key Model sized above 48"  ??????   

Thank you very much, I will copy all this for sure.