diff --git a/Elwig/App.xaml.cs b/Elwig/App.xaml.cs
index 6c7eaff..88bf04d 100644
--- a/Elwig/App.xaml.cs
+++ b/Elwig/App.xaml.cs
@@ -27,7 +27,7 @@ namespace Elwig {
         public static string? BranchPhoneNr { get; private set; }
         public static string? BranchFaxNr { get; private set; }
         public static string? BranchMobileNr { get; private set; }
-        public static IEnumerable<IScale> Scales { get; private set; }
+        public static IList<IScale> Scales { get; private set; }
         public static ClientParameters Client { get; private set;  }
 
         public static bool IsPrintingReady => Documents.Html.IsReady && Documents.Pdf.IsReady;
@@ -69,10 +69,10 @@ namespace Elwig {
 
             Client = new();
 
-            var list = new LinkedList<IScale>();
+            var list = new List<IScale>();
             foreach (var s in Config.Scales) {
                 try {
-                    var scaleNr = int.Parse(s[0]);
+                    var id = s[0];
                     var type = s[1].ToLower();
                     var model = s[2];
                     var cnx = s[3];
@@ -80,7 +80,7 @@ namespace Elwig {
                     var filling = s[5];
                     int? limit = s[6] == null ? null : int.Parse(s[6]);
                     if (type == "systec") {
-                        list.AddLast(new SystecScale(scaleNr, model, cnx, empty, filling, limit));
+                        list.Add(new SystecScale(id, model, cnx, empty, filling, limit));
                     } else {
                         throw new ArgumentException($"Invalid scale type: \"{type}\"");
                     }
diff --git a/Elwig/Helpers/Weighing/GassnerScale.cs b/Elwig/Helpers/Weighing/GassnerScale.cs
index 3c30f5c..e8d6c35 100644
--- a/Elwig/Helpers/Weighing/GassnerScale.cs
+++ b/Elwig/Helpers/Weighing/GassnerScale.cs
@@ -14,13 +14,13 @@ namespace Elwig.Helpers.Weighing {
         public string Manufacturer => "Gassner";
         public int InternalScaleNr => 1;
         public string Model { get; private set; }
-        public int ScaleNr { get; private set; }
+        public string ScaleId { get; private set; }
         public bool IsReady { get; private set; }
         public bool HasFillingClearance { get; private set; }
         public int? WeightLimit { get; private set; }
 
-        public GassnerScale(int scaleNr, string model, string connection) {
-            ScaleNr = scaleNr;
+        public GassnerScale(string id, string model, string connection) {
+            ScaleId = id;
             Model = model;
             IsReady = true;
             HasFillingClearance = false;
diff --git a/Elwig/Helpers/Weighing/IScale.cs b/Elwig/Helpers/Weighing/IScale.cs
index b13baf5..ffb9d1e 100644
--- a/Elwig/Helpers/Weighing/IScale.cs
+++ b/Elwig/Helpers/Weighing/IScale.cs
@@ -17,9 +17,9 @@ namespace Elwig.Helpers.Weighing {
         string Model { get; }
 
         /// <summary>
-        /// Unique number of the scale
+        /// Unique identificator of the scale
         /// </summary>
-        int ScaleNr { get; }
+        string ScaleId { get; }
 
         /// <summary>
         /// Internal identifying number of the scale in its system
diff --git a/Elwig/Helpers/Weighing/SchemberScale.cs b/Elwig/Helpers/Weighing/SchemberScale.cs
index e1ffa69..b69fd2e 100644
--- a/Elwig/Helpers/Weighing/SchemberScale.cs
+++ b/Elwig/Helpers/Weighing/SchemberScale.cs
@@ -7,7 +7,7 @@ namespace Elwig.Helpers.Weighing {
 
         public string Manufacturer => "Schember";
         public string Model => throw new NotImplementedException();
-        public int ScaleNr => throw new NotImplementedException();
+        public string ScaleId => throw new NotImplementedException();
         public int InternalScaleNr => throw new NotImplementedException();
         public bool IsReady => throw new NotImplementedException();
         public bool HasFillingClearance => throw new NotImplementedException();
diff --git a/Elwig/Helpers/Weighing/SystecScale.cs b/Elwig/Helpers/Weighing/SystecScale.cs
index 45451d3..1c072ce 100644
--- a/Elwig/Helpers/Weighing/SystecScale.cs
+++ b/Elwig/Helpers/Weighing/SystecScale.cs
@@ -22,13 +22,13 @@ namespace Elwig.Helpers.Weighing {
         public string Manufacturer => "SysTec";
         public int InternalScaleNr => 1;
         public string Model { get; private set; }
-        public int ScaleNr { get; private set; }
+        public string ScaleId { get; private set; }
         public bool IsReady { get; private set; }
         public bool HasFillingClearance { get; private set; }
         public int? WeightLimit { get; private set; }
 
-        public SystecScale(int scaleNr, string model, string connection, string? empty = null, string? fill = null, int? limit = null) {
-            ScaleNr = scaleNr;
+        public SystecScale(string id, string model, string connection, string? empty = null, string? fill = null, int? limit = null) {
+            ScaleId = id;
             Model = model;
             IsReady = true;
             HasFillingClearance = false;
diff --git a/Elwig/Helpers/Weighing/WeighingResult.cs b/Elwig/Helpers/Weighing/WeighingResult.cs
index 3ba98e7..fe037ce 100644
--- a/Elwig/Helpers/Weighing/WeighingResult.cs
+++ b/Elwig/Helpers/Weighing/WeighingResult.cs
@@ -22,5 +22,11 @@ namespace Elwig.Helpers.Weighing {
         /// Time string provided by the scale
         /// </summary>
         public string? Time = null;
+
+        /// <returns>&lt;Weight/WeighingId/Date/Time&gt;</returns>
+        override public string ToString() {
+            var w = Weight != null ? $"{Weight}kg" : "";
+            return $"<{w}/{WeighingId}/{Date}/{Time}>";
+        }
     }
 }
diff --git a/Elwig/Windows/DeliveryAdminWindow.xaml.cs b/Elwig/Windows/DeliveryAdminWindow.xaml.cs
index 2edd945..006ff43 100644
--- a/Elwig/Windows/DeliveryAdminWindow.xaml.cs
+++ b/Elwig/Windows/DeliveryAdminWindow.xaml.cs
@@ -54,7 +54,7 @@ namespace Elwig.Windows {
             if (IsReceipt) {
                 Title = "Übernahme - Elwig";
                 TodayOnlyInput.IsChecked = true;
-                var n = App.Scales.Count();
+                var n = App.Scales.Count;
                 if (n < 1) WeighingAButton.Visibility = Visibility.Hidden;
                 if (n < 2) WeighingBButton.Visibility = Visibility.Hidden;
                 if (n < 3) WeighingCButton.Visibility = Visibility.Hidden;