I am new to this site and I think it is great. I recently found 2 buttons in my mothers old button jar. The backmark says "Extra Quality". They are round and domed brass with a 2-headed bird perched on what appears to be an arrow. The arrow has some sort of a banner draped on it. The birds heads are facing in opposite directions with a crown between them. There is a triangle shaped crest on its breast. I cannot tell what is in the triangle and it looks like nothing is written on the banner. They feel heavy as though they are good quality. Thank you in advance for any help that you can give me.