diff --git a/src/nikonmn_int.cpp b/src/nikonmn_int.cpp
index e038825a..ee003472 100644
--- a/src/nikonmn_int.cpp
+++ b/src/nikonmn_int.cpp
@@ -2506,6 +2506,9 @@ fmountlens[] = {
 {0x00,0x40,0x11,0x11,0x2C,0x2C,0x00,0x00,0x00,0x00,0x00, "Samyang", "", "8mm f/3.5 Fish-Eye"},
 {0x00,0x58,0x64,0x64,0x20,0x20,0x00,0x00,0x00,0x00,0x00, "Soligor", "", "C/D Macro MC 90mm f/2.5"},
 //
+// https://github.com/Exiv2/exiv2/issues/743
+{0xc9,0x48,0x37,0x5c,0x24,0x24,0x4b,0x4e,0x01,0x00,0x00, "Sigma", "", "24-70mm F2,8 DG OS HSM Art"},
+//
 {0,0,0,0,0,0,0,0,0,0,0, NULL, NULL, NULL}
 };
 //------------------------------------------------------------------------------
diff --git a/test/data/issue_743.exv b/test/data/issue_743.exv
new file mode 100644
index 00000000..d7bc7e51
Binary files /dev/null and b/test/data/issue_743.exv differ
diff --git a/tests/bugfixes/github/test_issue_743.py b/tests/bugfixes/github/test_issue_743.py
new file mode 100644
index 00000000..bc45fabb
--- /dev/null
+++ b/tests/bugfixes/github/test_issue_743.py
@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+
+from system_tests import CaseMeta, path
+
+class Issue743NikonSigmaArtLens(metaclass=CaseMeta):
+    """
+    Regression test for the bug described in:
+    https://github.com/Exiv2/exiv2/issues/743
+    """
+    url = "https://github.com/Exiv2/exiv2/issues/743"
+
+    filename = path("$data_path/issue_743.exv")
+    commands = ["$exiv2 -pa --grep lensid/i $filename"]
+    stderr = [""]
+    stdout = [""
+        """Exif.NikonLd3.LensIDNumber                   Byte        1  Sigma 24-70mm F2,8 DG OS HSM Art
+"""
+]
+    retval = [0]