Welcome to the forum, long time no see.

You have to resize your photos to below 768K.  Use MS Paint to get them down if you have a windows box.

"Allowed file types: txt doc docx psd pdf bmp jpe jpg jpeg gif png swf zip rar tar
Maximum Attachment size: 768 KB"

Data is scanty across four hundred and eighty thousand guns and a hundred and twenty-five years but here is what Mallory and Olson has listed.

Serial Model MMDDYY Usage
130802 98R 011507 USNA