diff --git a/src/views/biz-gzcase.vue b/src/views/biz-gzcase.vue
index dc55cc6..0bc7264 100644
--- a/src/views/biz-gzcase.vue
+++ b/src/views/biz-gzcase.vue
@@ -66,23 +66,33 @@
               v-model="obj.created"
               :label="$sock.t('Created')"
               :rules="[form().required(this, 'created')]"
-              :readonly="formState.readOnly"
+              :readonly="true"
               :error-messages="form().serverErrors(this, 'created')"
               data-cy="created"
               @input="fieldValueChanged('created')"
             ></gz-date-time-picker>
           </v-col>
 
+          <!-- case 4604: closed is set by the Close / Reopen button, not picked (Sockeye only, so plain English) -->
           <v-col cols="12" sm="6" lg="4" xl="3">
             <gz-date-time-picker
               ref="closed"
               v-model="obj.closed"
               :label="$sock.t('GZCaseClosed')"
-              :readonly="formState.readOnly"
+              :readonly="true"
               :error-messages="form().serverErrors(this, 'closed')"
               data-cy="closed"
               @input="fieldValueChanged('closed')"
             ></gz-date-time-picker>
+            <v-btn
+              v-if="!formState.readOnly && obj.id != 0"
+              color="primary"
+              text
+              :disabled="formState.loading"
+              data-cy="closeOpen"
+              @click="setClosed(obj.closed == null)"
+              >{{ obj.closed == null ? "Close case" : "Reopen case" }}</v-btn
+            >
           </v-col>
 
           <!-- --------------------------------- -->
@@ -259,6 +269,15 @@ export default {
     form() {
       return window.$gz.form;
     },
+    async setClosed(close) {
+      //case 4604: Close sets the closed date to now, saves the case and goes back; Open clears it and saves
+      this.obj.closed = close ? window.$gz.locale.nowUTC8601String() : null;
+      this.fieldValueChanged("closed");
+      await this.submit();
+      if (close && !this.formState.dirty) {
+        this.$router.go(-1);
+      }
+    },
     fieldValueChanged(ref) {
       if (
         this.formState.ready &&