In addition to the higher yield upgrade option described above, a specific variant W87-1 entered Phase 3 development engineering and was assigned its type designation in November 1988.
Selain opsi peningkatan hasil yang lebih tinggi yang dijelaskan di atas, varian spesifik W87-1 memasuki teknik pengembangan Tahap 3 dan ditetapkan penunjukan jenisnya pada bulan November 1988.