I like anniversary logos so here is my take on opti's ;)
In line with my prefered style, this is modern, minimalistic and flat design. While trying to keep some elements from original logo I kept them small and not so prominient as big number, for which I introduced new font. Featuring original red shade, design is paired with dark and light grays. Badge works great with two colors, and works equaly well monochrome. For spaces with limited space and visibility, I made two simplifed versions making the design versatile for use accros media. Out of the box design fits in rectangle rather than overused circular logos usualy seen for such occasion ;)