It won't let me upload another picture, so here's a link to the picture of stamps:
http://www.sendspace.com/file/3ozibe

Here is a link that might be useful: Stamps picture

The link is asking me to download a file: I don't do that.

You can upload 1 picture per post or reply.
So if you reply to your own post you can add a picture with each one.

Dimensions are important.

Step 1 is identifying the coat of arms on the front. It may be a famous family, it may be a hotel's fake set. But your picture doesn 't show it as a closeup.

Here are more pictures of the plate in a link that doesn't require downloading:
http://postimg.org/image/mqqplf9sj/full/
http://postimg.org/image/sozxhx3df/full/
http://postimg.org/image/chy8fllqr/full/
(My iPhone is too slow and won't let me send a comment with a picture)

Thank you so much in advance!

Interesting ... It's an English piece, or for an English client. These were often made as chargers for grand ceremonial banquets given by a guild, or maybe a wedding feast when 2 prominent families merged.

If you can figure out who or what group the shields represent you can figure out how old it is and maybe what the occasion was. A rare occasion or a really popular participant would make the piece more collectible.

Start researching heraldry of England.

The various heraldic symbols on the left-most shield include the Tudor Rose, the spur of the knights of the Garter, a lion rampant, and the other quadrant is a repeating design called "Vair" (fur, although it looks nothing like it)?

The one on the right is a dog (called a "talbot sejant " in heraldry), and three crescent moons ... probably easier to identify.

The stamps on the reverse were too blurry to read.

Found this on the guy with the scale and sword:

"Look for the rare quality marks that started appearing around the 16th century. Among the earliest marks was the crown with a rose. The ore angel Michael, holding a sword in one hand and a balance in another, did not appear until the 18th century. The quality marks are good to place an age on a piece. But, because rules and regulations did not exist, any maker could and did put quality stamps on the pewter."

Link to article: http://www.ehow.com/how_7524742_identification-pewter-marks.html

Circles were used by females in Scotland, picked that up from one of the Heraldry sites.....

The crescents on the right circle: "The crescent stands for one who has been "enlightened and honored by the gracious aspect of his sovereign." It is also borne as a symbol of the hope of greater glory. Crescents also represent the moon that lights the night sky for travelers, though it does not resemble the shape of a crescent moon very closely. In English arms it was also a mark of cadency signifying the second son" I also found the three on a coat of arms for the family name "Albert".

The spur on the lower left Of the first circle: "A crest or coat of arms with the device of a spur on it was awarded to a knight who had done magnificent deeds. In some instances the spur is winged. Spurs are more often termed 'mullets of five points pierced,' which translates to five pointed stars with a hole in the center, or the part of the spur used to actually cut the horse. This was a dangerous implement, used by knights to stimulate their war-horses into action. It signifies preparedness or readiness for battle, pressing onward."

The vair in the upper left of first circle: "Fur of nobility cloaking the inside of a coat."

This was just from looking around the net, it was fun! Hope you can get some more answers for your piece.

Cheri