Gin as far as I can see she's a Black Bareback. I think from the picture her color goes onto her shoulders but if it doesn't, then she's a Black Capped. Basically I goes like this....Hooded rats always have the head and shoulder color then a stripe down the spine (broken or not as long as it's a stripe....solid and straight to the tail of course is best for show rats), Barebacks have the color on the head and shoulders but nothing on the back. Capped have it only on the head and not on the shoulders.

Here's an excellent page for markings (with pics).

http://www.afrma.org/ratmkd.htm

Like all rats housed alone, she'll be a bit needy for company so just give her a bit of extra attention until she can join the rest of your colony and have a cage buddy to hang out with.

Nice looking female.