diff --git a/go/views/follow_seat.go b/go/views/follow_seat.go
index 974eee90..a3ca3159 100644
--- a/go/views/follow_seat.go
+++ b/go/views/follow_seat.go
@@ -273,6 +273,24 @@ func (r *ProcessReader) hand(sw *seatFollow, inner *Picture) {
 	}
 }
 
+// HolderBucket is the bus name `<holder>_<state>` of the holder whose state FollowSeat follows now for seat, "" while it
+// follows none (design 47 G A-303): the name a part uses where another part names the holder's real bucket (a key the
+// watchman writes, a name kept in an entry), read at each use, so a moved holder is named as it moves.
+func (r *ProcessReader) HolderBucket(seat, state string) string {
+	r.mu.Lock()
+	sw := r.seats[seat+"_"+state]
+	r.mu.Unlock()
+	if sw == nil {
+		return ""
+	}
+	sw.mu.Lock()
+	defer sw.mu.Unlock()
+	if sw.holder == "" {
+		return ""
+	}
+	return sw.holder + "_" + state
+}
+
 // seatPicture is the picture of a seat's view by its bus name, nil when none.
 func (r *ProcessReader) seatPicture(bucket string) *Picture {
 	r.mu.Lock()
diff --git a/go/views/views_test.go b/go/views/views_test.go
index 806f67c4..bd4ef33e 100644
--- a/go/views/views_test.go
+++ b/go/views/views_test.go
@@ -1023,6 +1023,9 @@ func subViews(t *testing.T) {
 		if _, err := p.Get(context.Background(), "hold.a"); err == nil {
 			t.Errorf("a seat's view with no holder reads as held")
 		}
+		if b := r.HolderBucket("mesh-wants", "asks"); b != "" {
+			t.Errorf("with no holder the holder's bucket is %q", b)
+		}
 		ctx, cancel := context.WithCancel(context.Background())
 		defer cancel()
 		r.Ask(ctx, nil)
@@ -1054,6 +1057,9 @@ func subViews(t *testing.T) {
 		sh.Follower().Apply(Event{V: Version, Owner: "assigner", State: "seat-holders", Key: "mesh-wants", Revision: 2, Created: made,
 			Value: json.RawMessage(`{"holders":[{"module":"h1"}]}`)})
 		ready(`{"n":1}`)
+		if b := r.HolderBucket("mesh-wants", "asks"); b != "h1_asks" { // A-303: the holder's real bucket, at run time
+			t.Errorf("the holder's bucket is %q, want h1_asks", b)
+		}
 		if len(fs.m) != 0 {
 			t.Errorf("the holder's first view left the findings %v", fs.m)
 		}
@@ -1069,6 +1075,9 @@ func subViews(t *testing.T) {
 		sh.Follower().Apply(Event{V: Version, Owner: "assigner", State: "seat-holders", Key: "mesh-wants", Revision: 3, Created: made,
 			Value: json.RawMessage(`{"holders":[{"module":"h2"}]}`)})
 		ready(`{"n":3}`)
+		if b := r.HolderBucket("mesh-wants", "asks"); b != "h2_asks" {
+			t.Errorf("after the move the holder's bucket is %q, want h2_asks", b)
+		}
 		if keys, _ := p.Keys(ctx); strings.Join(keys, ",") != "hold.a" || r.Picture("h1_asks") != nil {
 			t.Errorf("after the move the picture holds %v, h1 followed %v", keys, r.Picture("h1_asks") != nil)
 		}