Looks like the compound of 2 coincident tetracontoctachora (cont), and indeed all but the Grünbaumian elements coincide by pairs.

Incidence matrix according to Dynkin symbol

β3x4x3o

both( . . . . ) | 576 |   1   2   1 |   2   1  1   2 |  1  2  1
----------------+-----+-------------+----------------+---------
both( . x . . ) |   2 | 288   *   * |   2   0  1   0 |  1  2  0
both( . . x . ) |   2 |   * 576   * |   1   1  0   1 |  1  1  1
sefa( β3x . . ) |   2 |   *   * 288 |   0   0  1   2 |  0  2  1
----------------+-----+-------------+----------------+---------
both( . x4x . ) |   8 |   4   4   0 | 144   *  *   * |  1  1  0
both( . . x3o ) |   3 |   0   3   0 |   * 192  *   * |  1  0  1
      β3x . . ) ♦   6 |   3   0   3 |   *   * 96   * |  0  2  0
sefa( β3x4x . ) |   8 |   0   4   4 |   *   *  * 144 |  0  1  1
----------------+-----+-------------+----------------+---------
both( . x4x3o ) ♦  24 |  12  24   0 |   6   8  0   0 | 24  *  *
      β3x4x .   ♦  48 |  24  24  24 |   6   0  8   6 |  * 24  *
sefa( β3x4x3o ) ♦  24 |   0  24  12 |   0   8  0   6 |  *  * 24

starting figure: x3x4x3o