Thanks so much for this!Wow , I thought it might be a dead bug got cooked on it when it was made. I tried making it more visible with Photoshop but not much luck. You can make out the outside lines , but not kanji detail. Maybe someone will be able to tell from just that. My best effort to get more detail looks like two tiny mice kissing .
Seems like a poorly-made 大過 "big mistake"
奉 - Wiktionary
en.wiktionary.org
奉 - Jisho.org
jisho.org
奉納 is a Japanese compound word, meaning "oblation". (Words or sentences are written from right to left in classical Japanese.)