Win 7 on separate HD (no bootcamp), accidentally deleted partition

[Sven71]

I screwed it up: In an attempt at making room for backups on Mac OS X using Apples HD tool I misclicked and wiped out the partition my Win 7 installation was on (quick erase, no overwrite stuff).

Is there any chance to recover that NTFS partition and if so, what further info would you need to give advice?

Terminal returns this

macpro:~ Sven$ sudo gpt -r -vv show disk3
gpt show: disk3: mediasize=160041885696; sectorsize=512; blocks=312581808
gpt show: disk3: MBR at sector 0
start size index contents
0 1 MBR
1 62
63 312581745 1 MBR part 7