97-98 SHBM with smooth handle slabs and smooth bolts or slotted bolts
these are the oldest of the SHBM's. Probably the first 50 -100 had these handles I am guessing. LE#37 had them and the 1 of 6 I use to have had them also but with slotted bolts.
97-98 SHBM with partially grooved handle slabs slotted screws
most of these were slotted screws but I have had a few with hollow rivets. Arguably the most desirable SHBM handle
97- 98 - SHBM with fully grooved handle slabs and slotted screws
98-99 SHBM with partially grooved handle and hollow rivets
99 - SHBM with fully grooved handle slabs and hollow rivets
The most common SHBM handle.
mid 99 - SHBM with angle grooved micarta handles and hollow rivets
this is near the end of the SHBM production run and were not very common. I have not see coated SHBM's with this handle but I have a few uncoated ones with this handle. Probably the rarest of all handles that I have noticed.
the end - SHBM with diamond quilted micarta handles like the E-handles.