| Number of vertices: | $552$ | 
| Diameter: | $3$ | 
| Intersection array: | $\{275,112,1;1,112,275\}$ | 
| Spectrum: | $(275)^{1} (55)^{23} (-1)^{275} (-5)^{253}$ | 
| Automorphism group: | $Co_3 \times 2$ | 
| Distance-transitive: | Yes | 
| Antipodal | 
| Number of vertices: | $552$ | 
| Diameter: | $3$ | 
| Intersection array: | $\{275,162,1;1,162,275\}$ | 
| Spectrum: | $(275)^{1} (5)^{253} (-1)^{275} (-55)^{23}$ | 
| Automorphism group: | $Co_3 \times 2$ | 
| Distance-transitive: | Yes | 
| Antipodal |