Really nice Goncalo Alves (tigerwood) has a very unique figure. It is pretty hard to mistake for anything else.
Here is a photo of 68 Griz, 69 KH and 69 KMag tigerwood bows. Disclaimer: These ARE NOT my bows.....they belong to another collector in Italy. These bows are nice examples of Goncalo Alves, with the 68 Griz being the shining star in this group. The 69 KH in the photo is OK, but I have seen many 69 KHs with similar (and better) figure to the 68 Griz in the photo. There are members here that have some absolutely knockout 69 KHs made with tigerwood.
Bear made other model bows in the same general time frame with Tigerwood, but these three models are the most commonly found.