diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index fed29b1be..0d7b0548a 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.15.1
+current_version = 3.15.2
 commit = True
 tag = False
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<release>[a-z]+)?(?P<patch>\d+)?
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 101191acd..2d92ab45a 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,12 @@
+DIALS 3.15.2 (2023-08-09)
+=========================
+
+Features
+--------
+
+- Update Format handling to reflect move of Eiger detector from PETRA P14 to P13. (`#626 <https://github.com/cctbx/dxtbx/issues/626>`_)
+
+
 DIALS 3.15.1 (2023-06-29)
 =========================
 
diff --git a/setup.py b/setup.py
index 1da76bbec..7c9df5585 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 
 # Static version number which is updated by bump2version
 # Do not change this manually - use 'bump2version <major/minor/patch/release>'
-__version_tag__ = "3.15.1"
+__version_tag__ = "3.15.2"
 
 setup_kwargs = {
     "name": "dxtbx",
diff --git a/src/dxtbx/format/FormatCBFMini.py b/src/dxtbx/format/FormatCBFMini.py
index 4561665fd..39060f84a 100644
--- a/src/dxtbx/format/FormatCBFMini.py
+++ b/src/dxtbx/format/FormatCBFMini.py
@@ -8,6 +8,7 @@
 from __future__ import annotations
 
 import binascii
+import datetime
 import os
 import pathlib
 import sys
@@ -73,6 +74,20 @@ def __init__(self, image_file, **kwargs):
         self._raw_data = None
         super().__init__(image_file, **kwargs)
 
+    @staticmethod
+    def _get_timestamp_from_raw_header(
+        header: str | list[str],
+    ) -> datetime.datetime | None:
+        """Given a raw header, or lines from, attempt to extract the timestamp field"""
+        if isinstance(header, str):
+            header = header.splitlines()
+        timestamp = None
+        for record in header:
+            if len(record[1:].split()) <= 2 and record.count(":") == 2:
+                timestamp = datetime.datetime.fromisoformat(record[1:].strip())
+                break
+        return timestamp
+
     def _start(self):
         """Open the image file, read the image header, copy it into a
         dictionary for future reference."""
diff --git a/src/dxtbx/format/FormatCBFMiniEigerPetraP14.py b/src/dxtbx/format/FormatCBFMiniEigerPetraP14.py
index 530948590..36b5cce91 100644
--- a/src/dxtbx/format/FormatCBFMiniEigerPetraP14.py
+++ b/src/dxtbx/format/FormatCBFMiniEigerPetraP14.py
@@ -3,6 +3,7 @@
 
 from __future__ import annotations
 
+import datetime
 import sys
 
 from dxtbx.format.FormatCBFMiniEiger import FormatCBFMiniEiger
@@ -19,11 +20,21 @@ def understand(image_file):
 
         header = FormatCBFMiniEiger.get_cbf_header(image_file)
 
+        # Valid from 22nd May 2021
+        expected_serial = "E-32-0129"
+        if timestamp := FormatCBFMiniEiger._get_timestamp_from_raw_header(header):
+            # We have a timestamp. Let's see what detector we should expect
+
+            # Before 22nd May 2021
+            if timestamp < datetime.datetime(2021, 5, 22):
+                expected_serial = "E-32-0107"
+
+        # Find the line recording detector serial, and check
         for record in header.split("\n"):
             if (
                 "# detector" in record.lower()
                 and "eiger" in record.lower()
-                and "E-32-0107" in record
+                and expected_serial in record
             ):
                 return True