A completely immersed minimal surface with finite total curvature, boundary, genus 1 and 3 ends. It's also called a 3-punctured torus.
vertices: 77
faces: 64+3
edges: 144
genus: 1
characteristic polynomial:
(5 - 5x + x2) ... (1 - 144x2 + ... + x16)2
dual's characteristic polynomial:
chromatic number: 2
lattice group (lossy):
Z(2) 75