I'm new to the terminology in coin collecting and identification of errors. So please be patient with me , I'm learning. This dime has no mint mark. It appears that the date numbers are flattened and looked "smeared". Can I get a pair of fresh eyes opinion?! My eyes are crossing
Welcome to Coin Talk. As wxcoin said, your coin was made at the Philly mint. The flattening of the date is due to circulation wear. I noticed in the pic of the dime's reverse that left side of the rim looks thicker than the right side, mostly around the area of the last A of America. This could be an indication of a misaligned die (MAD). But then again, this also could be due to circulation wear. Others with more knowledge might chime in. Again, welcome to Coin Talk.
@wxcoin is correct, no mint mark was used for Philadelphia coins in 1978, dimes began getting mint marks on the obverse in 1980. The flattening of the date is due to wear from circulation. You can see it also on the other side of the obverse where IN and WE show flattening too, next to the rim, where a lot of wear action occurs. Other spots that show wear first are the high spots of the bust…the hair, nose, cheek, ear and jaw of Roosevelt. Get yourself a Yeoman Red Book. It has all the info regarding mint mark placements and a whole lot more…imo…Spark
I doubt the flattened digits are from circulation wear as they are right against the rim which would have protected them. I think it is just uncomplete filling of the die. They weren't fully struck up in the first place.
Welcome to CT Emily. I believe your question was answered above, so I have nothing more to offer. Good luck. Oh, BTW, I post the below for most new members. I hope it will help in the future. For the best results, you should post "in focus," FULL IMAGE photos (after you upload your photo, two buttons appear: Thumbnail and Full Image, click Full Image and your photo appears full size on your post and are easily enlarged by clicking on it). Photograph coins on neutral backgrounds like black, grey, or white. Crop out superfluous background so just the coin shows (you can use https://www.remove.bg for free), and post photos with correct orientation so members don't have to turn their computer in some awkward fashion to view it properly. While it isn’t always necessary, it is nice to show both the obverse and reverse, even if your question is just about one side. Members can often give more valuable information having both sides to evaluate. Add close ups of areas you have questions about and make your questions as definitive as possible so we know what you are asking for. And try to have the best lighting possible to show the most favorable photo of the coin. Hope this helps in the future.