diff --git a/sample_data/images/Bachmann_bros_logo.png b/sample_data/images/Bachmann_bros_logo.png
new file mode 100644
index 0000000..5fd643c
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diff --git a/sample_data/images/ferro_logo.png b/sample_data/images/ferro_logo.png
new file mode 100644
index 0000000..88a6569
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diff --git a/sample_data/images/liliput_logo.png b/sample_data/images/liliput_logo.png
new file mode 100644
index 0000000..e64417d
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diff --git a/sample_data/images/oebb_logo.png b/sample_data/images/oebb_logo.png
new file mode 100644
index 0000000..dcb2194
Binary files /dev/null and b/sample_data/images/oebb_logo.png differ
diff --git a/sample_data/images/roco_logo.png b/sample_data/images/roco_logo.png
new file mode 100644
index 0000000..7d507ae
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diff --git a/sample_data/images/scrr.png b/sample_data/images/scrr.png
new file mode 100644
index 0000000..a089e4c
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diff --git a/sample_data/images/staengl_logo.png b/sample_data/images/staengl_logo.png
new file mode 100644
index 0000000..f831f44
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diff --git a/sample_data/metadata.json b/sample_data/metadata.json
index 6b3e77d..d47043f 100644
--- a/sample_data/metadata.json
+++ b/sample_data/metadata.json
@@ -20,7 +20,7 @@
         "name": "Roco",
         "category": "model",
         "website": "https://www.roco.cc/",
-        "logo": "images/Roco_logo_ABtacmm.png"
+        "logo": "images/roco_logo.png"
     }
 },
 {
@@ -60,7 +60,7 @@
         "name": "Bachmann",
         "category": "model",
         "website": "https://bachmanntrains.com/",
-        "logo": "images/Bachmann_bros_logo.png"
+        "logo": "images/bachmann_logo.png"
     }
 },
 {
@@ -161,7 +161,7 @@
         "extended_name": "Österreichische Bundesbahnen",
         "country": "AT",
         "freelance": false,
-        "logo": "images/ÖBB_Logo_Pflatsch_neu_vQraZ8r.png"
+        "logo": "images/oebb_logo.png"
     }
 },
 {
@@ -172,7 +172,7 @@
         "extended_name": "Sand Creek Railroad",
         "country": "US",
         "freelance": true,
-        "logo": "images/scrr_Ikh9VQ4.png"
+        "logo": "images/scrr.png"
     }
 },
 {