This coat-of-arms is one commonly used by Sedgwicks. One Sedgwick who apparently used it was William Sedgwicke, father of General Robert Sedgwick who emmigrated to Charlestown, Massachusetts about 1635.

The shield is "Or, on a cross gu. five bells of the field." The crest is "A Lion Passant through sedge on cap of maintenance."

The lion is red, the sedge green, the crown of the cap is red and the ermine trim white. The shield is gold with a red cross. The five bells are gold.

The motto is "Confido in Domino" which is Latin and means "Trust in God."

Sources:

The General Armory Burke's Peerage, Limited :
SEDGEWICK (Co. Lancaster) : "Or. on a cross gu. five bells of the field"

SEDGEWICKE (Wisbeach, Isle of Ely) : "Ar. on a cross gu., five bells of the first"

(or. = gold, argent = silver, gules = red)

Heraldic Journal :
The arms of the widow of John Leverett :
1st argent , a chevron between three leverets, sable, impaling, 2nd, gold on a cross gules, five bells argent.
The arms impaled are certainly those of Sedgwick, Leverett married Sarah Sedgwick.
Sarah Sedgwick the daughter of General Robert Sedgwick.
Sedgwick.org note: Sarah Sedgwick who married John Leverett was a sister of Robert Sedgwick
This variation of the above coat (or is the above a variation of this?) was sent to me by an art historian. She found it as a bookplate glued inside each book of a ten volume set of the works of Shakespeare published in 1767.

Apparently John Sedgwick of Nottingham, born 1751 owned the set. Apparently this is the coat-of-arms he or his ancestors used. I found it interesting in that it does not have the lion and cap of the above. Is that grass (sedge) or rye? (See below)

In a recent archeological excavation a wine bottle was found with a seal which features another variation of the above coat-of-arms

I found in a book (I can't find the copy of the title page) this image with the description: "Sedgewick, or Sedgewicke, two ears of rye, in saltier, or."

This is another Sedgwick arms. Mark A Sedgwick, webmaster of SedgwickResearch.com found this description in a book that claimed to quote Burke's General Armory:

    "Sa. An inescutcheon ar. an orle of martlets of the last."
When translated the blazon also describes the original colors of the Sedgiwck arms as:
    "Black; a small silver shield; an inner border of silver martlets."
above the shield and helmet is the crest which is described as:
    "Two gold ears of rye crossing diagonally."

The first photo is more true to color, the second is color enhanced to better show the detail.
Note the crest is exactly the rye crest above, "two ears of rye, in saltier."
photo courtesy of Leslie Wilson

 
"Sedgewick, a sunflower"
from the same book that had the rye crest above.